The present invention relates generally to speech recognition systems and methods. More particularly, the present invention relates to systems and methods for activating a direction setting of a multi-directional microphone array in response to a sensor determining a relative location of a user within one of a plurality of voice pickup areas of the multi-directional microphone array.
Known speech recognition systems and methods use a multi-directional microphone array operating initially in a directionless setting. The multi-directional microphone array detects a wakeup command from within one of a plurality of voice pickup areas and, in response, activates a direction setting associated with the one of the plurality of voice pickup areas that receives the wakeup command to enhance speech recognition of forthcoming speech coming from the one of the plurality of voice pickup areas. However, such known systems and methods do not activate the direction setting prior to receiving the wakeup command, which results in unintended or missed activation of the multi-directional microphone array caused by interference during operation in the directionless setting.
In view of the above, there is a continuing, ongoing need for improved systems and methods.
While this invention is susceptible of an embodiment in many different forms, there are shown in the drawings and will be described herein in detail specific embodiments thereof with the understanding that the present disclosure is to be considered as an exemplification of the principles of the invention. It is not intended to limit the invention to the specific illustrated embodiments.
Embodiments disclosed herein can include systems and methods for automatic speech recognition. For example, systems and methods disclosed herein can include a sensor detecting a relative location of a user within one of a plurality of voice pickup areas of a multi-directional microphone array and the multi-directional microphone array activating a direction setting of the multi-directional microphone array based on the relative location of the user within the one of the plurality of voice pickup areas, wherein the direction setting enhances speech recognition by the multi-directional microphone array from the relative location of the user within the one of the plurality of voice pickup areas.
Systems and methods as disclosed herein may be deployed as standalone devices interacting together or as a part of home automation systems or security systems. It is to be understood that such systems can include, but are not limited to systems that include a control panel in communication with a sensor or a plurality of sensors and a multi-directional microphone array or a plurality of multi-directional microphone arrays deployed in a region
In accordance with disclosed embodiments, each of a plurality of sensors may be positioned to detect a respective location of the user within a respective one of the plurality of voice pickup areas of the multi-directional microphone array. Accordingly, the sensor may be positioned to detect the relative location of the user within the one of the plurality of voice pickup areas of the multi-directional microphone array. Each of the plurality of voice pickup areas may detect sound or recognize voice commands from a respective direction surrounding the multi-directional microphone array. Accordingly, as the user enters a field of view or detection area of the sensor, the sensor may detect the relative location of the user that corresponds to the one of the plurality of voice pickup areas. In response to the sensor detecting the relative location of the user, the multi-directional microphone array may activate a direction setting associated with the one of the plurality of voice pickup areas. The direction setting may be used to enhance speech recognition by the multi-directional microphone array in the direction of the one of the plurality of voice pickup areas, thereby enhancing the ability of the multi-directional microphone array to receive wakeup commands from the relative location of the user, which can facilitate avoiding or reducing unintended or missed wakeup commands. In some embodiments, the sensor can include a microwave-based location sensor. However, additional types of sensors known in the art for detecting the relative location of the user may come within the spirit and scope of disclosed embodiments.
In some embodiments, when the direction setting is activated, the multi-directional microphone array may detect the wakeup command from the relative location of the user and, in response, may enter an active listening mode to identify additional commands or speech commands coming from the direction of the relative location of the user. In some embodiments, the direction setting may include directing a beamforming function of the multi-directional microphone array toward the relative location of the user within the one of the plurality of voice pickup areas.
In some embodiments, a control panel or similar control unit may be electrically coupled to the sensor and the multi-directional microphone array. The control panel may transfer data indicative of the relative location of the user between the sensor and the multi-directional microphone array using either wired or wireless communication methods. In some embodiments, the sensor can be paired with the multi-directional microphone array to directly communicate the relative location of the user to the multi-directional microphone array. In some embodiments, communication of the relative location of the user from the sensor to the multi-directional microphone array, either directly or through the control panel, can be accomplished using an Internet-based communication protocol.
In some embodiments, a plurality of sensors and a plurality of multi-directional microphone arrays may be placed throughout the region and coupled to the control panel. Each of the plurality of multi-directional microphone arrays may include a respective plurality of voice pickup areas that operate as described herein. The respective plurality of voice pickup areas may detect sound or recognize voice commands from multiple different directions surrounding a respective one of the plurality of multi-directional microphone arrays.
In some embodiments, as the user enters the field of view or the detection area of one of the plurality of sensors, the one of the plurality of sensors may detect the relative location of the user within the region and forward the relative location to the control panel. In response to the one of the plurality of sensors detecting the relative location of the user, the control panel may identify one of the plurality of multi-directional microphone arrays for which one of the respective plurality of voice pickup areas is closest to or within range of the relative location of the user and may send the relative location to the one of the plurality of multi-directional microphone arrays.
In some embodiments, the one of the plurality of multi-directional microphone arrays may activate a respective direction setting associated with the one of the respective plurality of voice pickup areas. The respective direction setting may be used to enhance speech recognition by the one of the plurality of multi-directional microphone arrays in the direction of the one of the respective plurality of voice pickup areas, thereby enhancing the ability of the plurality of multi-directional microphone arrays to receive wakeup commands from the relative location of the user within the region, which can facilitate avoiding or reducing unintended or missed wakeup commands. In some embodiments, the plurality of sensors can include microwave-based location sensors. However, additional types of sensors known in the art for detecting the relative location of the user come within the spirit and scope of disclosed embodiments.
In some embodiments, when the respective direction setting is activated, the one of the plurality of multi-directional microphone arrays may detect wakeup commands from the relative location of the user within the region and, in response, may enter the active listening mode to identify the additional commands or the speech commands from within the one of the respective plurality of voice pickup areas. In some embodiments, the respective direction setting may include directing the beamforming function associated with the one of the respective plurality of voice pickup areas of the one of the plurality of multi-directional microphone arrays toward the relative location of the user within the region.
As shown in
In some embodiments, as shown in
In some embodiments, as shown in
Although a few embodiments have been described in detail above, other modifications are possible. For example, the steps described above do not require the particular order described or sequential order to achieve desirable results. Other steps may be provided, steps may be eliminated from the described flows, and other components may be added to or removed from the described systems. Other embodiments may be within the scope of the invention.
From the foregoing, it will be observed that numerous variations and modifications may be effected without departing from the spirit and scope of the invention. It is to be understood that no limitation with respect to the specific system or method described herein is intended or should be inferred. It is, of course, intended to cover all such modifications as fall within the spirit and scope of the invention.
Number | Name | Date | Kind |
---|---|---|---|
4223831 | Szarka | Sep 1980 | A |
4253153 | Bitterli et al. | Feb 1981 | A |
4340797 | Takano et al. | Jul 1982 | A |
4353502 | Myers | Oct 1982 | A |
4381549 | Stamp, Jr. et al. | Apr 1983 | A |
4598397 | Nelson et al. | Jul 1986 | A |
4790143 | Hanson | Dec 1988 | A |
5065813 | Berkeley et al. | Nov 1991 | A |
5086385 | Launey et al. | Feb 1992 | A |
5123252 | Hanson | Jun 1992 | A |
5161606 | Berkeley et al. | Nov 1992 | A |
5284024 | Hanson et al. | Feb 1994 | A |
5345226 | Rice et al. | Sep 1994 | A |
5395042 | Riley et al. | Mar 1995 | A |
5422822 | Toyota et al. | Jun 1995 | A |
5422824 | Biehler et al. | Jun 1995 | A |
5481714 | Pipkin et al. | Jan 1996 | A |
5553064 | Paff et al. | Sep 1996 | A |
5596507 | Jones et al. | Jan 1997 | A |
5682329 | Seem et al. | Oct 1997 | A |
5690277 | Flood | Nov 1997 | A |
5761606 | Wolzien | Jun 1998 | A |
5794205 | Walters et al. | Aug 1998 | A |
5818438 | Howe et al. | Oct 1998 | A |
5892508 | Howe et al. | Apr 1999 | A |
5903816 | Broadwin et al. | May 1999 | A |
5929850 | Broadwin et al. | Jul 1999 | A |
5940118 | Van Schyndel | Aug 1999 | A |
5961603 | Kunkel et al. | Oct 1999 | A |
5982445 | Eyer et al. | Nov 1999 | A |
5995092 | Yuen et al. | Nov 1999 | A |
6002394 | Schein et al. | Dec 1999 | A |
6005561 | Hawkins et al. | Dec 1999 | A |
6006256 | Zdepski et al. | Dec 1999 | A |
6009392 | Kanevsky et al. | Dec 1999 | A |
6083270 | Scott | Jul 2000 | A |
6172677 | Stautner et al. | Jan 2001 | B1 |
6385510 | Hoog et al. | May 2002 | B1 |
6413079 | Lyons et al. | Jul 2002 | B1 |
6477493 | Brooks et al. | Nov 2002 | B1 |
6477508 | Lazar et al. | Nov 2002 | B1 |
6526335 | Treyz et al. | Feb 2003 | B1 |
6584439 | Geilhufe et al. | Jun 2003 | B1 |
6584613 | Dunn et al. | Jun 2003 | B1 |
6608560 | Abrams | Aug 2003 | B2 |
6624750 | Marman et al. | Sep 2003 | B1 |
6813221 | Barr | Nov 2004 | B1 |
6988070 | Kawasaki et al. | Jan 2006 | B2 |
7042349 | Bergman et al. | May 2006 | B2 |
7108194 | Hankins, II | Sep 2006 | B1 |
7113090 | Saylor et al. | Sep 2006 | B1 |
7119658 | Stilp | Oct 2006 | B2 |
7139716 | Gaziz | Nov 2006 | B1 |
7146253 | Hoog et al. | Dec 2006 | B2 |
7162253 | Vare et al. | Jan 2007 | B2 |
7183907 | Simon et al. | Feb 2007 | B2 |
7184960 | Deisher et al. | Feb 2007 | B2 |
7280643 | Howard et al. | Oct 2007 | B2 |
7349758 | Miro et al. | Mar 2008 | B2 |
7397363 | Joao | Jul 2008 | B2 |
7436292 | Rourke et al. | Oct 2008 | B2 |
7436296 | Rourke et al. | Oct 2008 | B2 |
7451937 | Flood et al. | Nov 2008 | B2 |
7454269 | Dushane et al. | Nov 2008 | B1 |
7464035 | Funk et al. | Dec 2008 | B2 |
7522063 | Ehlers | Apr 2009 | B2 |
7634504 | Amundson | Dec 2009 | B2 |
7675402 | Lee et al. | Mar 2010 | B2 |
7720683 | Vermeulen et al. | May 2010 | B1 |
7747446 | Blass et al. | Jun 2010 | B2 |
7752047 | Morris | Jul 2010 | B2 |
7890334 | Park et al. | Feb 2011 | B2 |
7899912 | Bisdikian et al. | Mar 2011 | B2 |
7957974 | Cho et al. | Jun 2011 | B2 |
8013730 | Oh et al. | Sep 2011 | B2 |
8019567 | Steinberg et al. | Sep 2011 | B2 |
8042048 | Wilson et al. | Oct 2011 | B2 |
8068881 | Schrager | Nov 2011 | B2 |
8078472 | Resch et al. | Dec 2011 | B2 |
8099289 | Mozer et al. | Jan 2012 | B2 |
8107989 | Budampati et al. | Jan 2012 | B2 |
8155767 | ElMankabady et al. | Apr 2012 | B2 |
8175884 | Morris | May 2012 | B1 |
8234119 | Dhawan et al. | Jul 2012 | B2 |
8239922 | Sullivan et al. | Aug 2012 | B2 |
8340975 | Rosenberger | Dec 2012 | B1 |
8350666 | Kore | Jan 2013 | B2 |
8411590 | Wang | Apr 2013 | B2 |
8509954 | Imes et al. | Aug 2013 | B2 |
8630742 | Stefanski et al. | Jan 2014 | B1 |
8699944 | Malamud et al. | Apr 2014 | B2 |
8918219 | Sloo et al. | Dec 2014 | B2 |
8976937 | Shapiro et al. | Mar 2015 | B2 |
9043210 | Adcock et al. | May 2015 | B1 |
9240182 | Lee et al. | Jan 2016 | B2 |
9354310 | Visser et al. | May 2016 | B2 |
10030878 | Nemcek et al. | Jul 2018 | B2 |
10145579 | Stoner et al. | Dec 2018 | B2 |
20020034956 | Mekuria | Mar 2002 | A1 |
20020123896 | Diez et al. | Sep 2002 | A1 |
20020193989 | Geilhufe et al. | Dec 2002 | A1 |
20030034898 | Shamoon et al. | Feb 2003 | A1 |
20030036909 | Kato | Feb 2003 | A1 |
20030088642 | Price et al. | May 2003 | A1 |
20030117486 | Ferren | Jun 2003 | A1 |
20030118200 | Beaucoup et al. | Jun 2003 | A1 |
20030177012 | Drennan | Sep 2003 | A1 |
20030233432 | Davis et al. | Dec 2003 | A1 |
20040019489 | Funk et al. | Jan 2004 | A1 |
20040215750 | Stilp | Oct 2004 | A1 |
20050002535 | Liu et al. | Jan 2005 | A1 |
20060161270 | Luskin et al. | Jul 2006 | A1 |
20060180676 | Park et al. | Aug 2006 | A1 |
20060282649 | Malamud et al. | Dec 2006 | A1 |
20070012793 | Flood et al. | Jan 2007 | A1 |
20070135969 | Curl | Jun 2007 | A1 |
20070192486 | Wilson et al. | Aug 2007 | A1 |
20070204228 | Minear | Aug 2007 | A1 |
20070247301 | Browne | Oct 2007 | A1 |
20070263600 | Sutardja et al. | Nov 2007 | A1 |
20070286181 | Bushmitch et al. | Dec 2007 | A1 |
20080037727 | Sivertsen et al. | Feb 2008 | A1 |
20080072314 | Frenette | Mar 2008 | A1 |
20080091432 | Dalton et al. | Apr 2008 | A1 |
20080150679 | Bloomfield | Jun 2008 | A1 |
20080175261 | Wang | Jul 2008 | A1 |
20080221714 | Schoettle | Sep 2008 | A1 |
20080233983 | Park et al. | Sep 2008 | A1 |
20090059786 | Budampati | Mar 2009 | A1 |
20090064295 | Budampati | Mar 2009 | A1 |
20090086940 | Diethorn et al. | Apr 2009 | A1 |
20090134993 | Ashworth | May 2009 | A1 |
20090143918 | Amundson et al. | Jun 2009 | A1 |
20090204262 | Nishimura | Aug 2009 | A1 |
20090204410 | Mozer et al. | Aug 2009 | A1 |
20090323904 | Shapiro et al. | Dec 2009 | A1 |
20100223055 | Mclean | Sep 2010 | A1 |
20100332235 | David | Dec 2010 | A1 |
20110046792 | Imes et al. | Feb 2011 | A1 |
20110140914 | Pelech et al. | Jun 2011 | A1 |
20110210816 | Wang | Sep 2011 | A1 |
20110257973 | Chutorash et al. | Oct 2011 | A1 |
20110260832 | Ross et al. | Oct 2011 | A1 |
20110290893 | Steinberg | Dec 2011 | A1 |
20120021684 | Schultz et al. | Jan 2012 | A1 |
20120062729 | Hart et al. | Mar 2012 | A1 |
20120065973 | Cho et al. | Mar 2012 | A1 |
20120066286 | Heredia et al. | Mar 2012 | A1 |
20120116748 | Kore et al. | May 2012 | A1 |
20120123561 | Park et al. | May 2012 | A1 |
20120136666 | Corpier et al. | May 2012 | A1 |
20120158161 | Cohn et al. | Jun 2012 | A1 |
20120327115 | Chhetri et al. | Dec 2012 | A1 |
20130006400 | Caceres et al. | Jan 2013 | A1 |
20130035774 | Warren et al. | Feb 2013 | A1 |
20130077797 | Hoy et al. | Mar 2013 | A1 |
20130117395 | Bushmitch et al. | May 2013 | A1 |
20130138250 | Mowery et al. | May 2013 | A1 |
20130183944 | Mozer et al. | Jul 2013 | A1 |
20130297078 | Kolavennu | Nov 2013 | A1 |
20140098233 | Martin et al. | Apr 2014 | A1 |
20140153281 | Zhao et al. | Jun 2014 | A1 |
20140153747 | Contolini et al. | Jun 2014 | A1 |
20140163751 | Davis et al. | Jun 2014 | A1 |
20140195233 | Bapat | Jul 2014 | A1 |
20140266687 | Britton | Sep 2014 | A1 |
20140278394 | Bastyr et al. | Sep 2014 | A1 |
20140330435 | Stoner et al. | Nov 2014 | A1 |
20150053779 | Adamek et al. | Feb 2015 | A1 |
20150053780 | Nelson et al. | Feb 2015 | A1 |
20150053781 | Nelson et al. | Feb 2015 | A1 |
20150077553 | Dawes | Mar 2015 | A1 |
20150187354 | Kim | Jul 2015 | A1 |
20150276254 | Nemcek et al. | Oct 2015 | A1 |
20150279134 | Warren | Oct 2015 | A1 |
20150324179 | Nye | Nov 2015 | A1 |
20160134632 | Cregg | May 2016 | A1 |
20160134966 | Fitzgerald | May 2016 | A1 |
20160249132 | Oliaei | Aug 2016 | A1 |
20160360526 | Lehmann et al. | Dec 2016 | A1 |
20170019362 | Kim et al. | Jan 2017 | A1 |
20180176680 | Knight et al. | Jun 2018 | A1 |
20180367944 | Heo et al. | Dec 2018 | A1 |
Number | Date | Country |
---|---|---|
201225714 | Apr 2009 | CN |
101947788 | Jan 2011 | CN |
202092667 | Dec 2011 | CN |
102332204 | Jan 2012 | CN |
102436273 | May 2012 | CN |
1054387 | Nov 2000 | EP |
1119191 | Jul 2001 | EP |
1260886 | Nov 2002 | EP |
1345360 | Jul 2006 | EP |
1135757 | Nov 2006 | EP |
1415218 | Feb 2011 | EP |
2801972 | Nov 2014 | EP |
2094508 | Sep 1982 | GB |
2006208460 | Aug 2006 | JP |
2006317573 | Nov 2006 | JP |
2010181064 | Aug 2010 | JP |
2010236759 | Oct 2010 | JP |
201000263563 | Mar 2010 | KR |
20110012048 | Feb 2011 | KR |
20110045314 | May 2011 | KR |
20120017492 | Feb 2012 | KR |
101151571 | May 2012 | KR |
1993013507 | Jul 1993 | WO |
1999034339 | Jul 1999 | WO |
0021053 | Apr 2000 | WO |
2006033760 | Mar 2006 | WO |
2006126192 | Nov 2006 | WO |
2007101164 | Sep 2007 | WO |
2008018102 | Feb 2008 | WO |
2009107211 | Sep 2009 | WO |
2009147927 | Dec 2009 | WO |
2014004911 | Jan 2014 | WO |
2015026933 | Feb 2015 | WO |
Entry |
---|
European Search Report for European Patent Application 21168434.5, dated Sep. 2, 2021, 12 pgs. |
Action Talking Products LLC, “Kelvin Installation Manual,” V1.5, pp. 1-15, downloaded Jul. 14, 2015. |
Storify, “A Thermostat That Speaks to a Consumer's Needs,” https://storify.com/plumbingtips969/a-thermostat-that-speaks-to-a-consumer-s-needs, printed Jul. 14, 2015, 3 pgs. |
SmartWay Solutions, Inc., “Talking Thermostat Model VT3000, User's Guide,” downloaded Jul. 14, 2015, 20 pgs. |
Systems Controls & Instruments, LLC, “CEM-24 Series Owner's Manual—Installation and Operating Instructions,” Rev 6.4, downloaded Jul. 14, 2015, 32 pgs. |
“T2 RERC Rehabilitation Engineering Research Center on Technology Transfer, Accessible Thermostat,” downloaded Jun. 6, 2013, 40 pgs. |
Brown, et al., “Joint DoD/Industry Study on Opportunities in Integrated Diagnostics,” Institute for Defense Analysis, Jan. 1990, 110 pgs. |
Carrier Comfort Network, “Carrier Comfort System VVTIII,” Aug. 1996, 6 pgs. |
Carvalho et al., “Voice Thermostat Remote Control,” Proceedings of the IEEE 25th Annual Northeast Bioengineering Conference pp. 59-60, Apr. 8-9, 1999. |
Coleman, “Hints for Homeowner's, A Thermostat That Speaks to Consumer's Needs,” on or before Jul. 20, 2006, 1 pg. |
Honeywell, “PM7006A Network Compatible Computer Room Air Conditioning (CRAC) Program Module for W7600 Control Module,” Aug. 1993, 72 pgs. |
“Kelvin Voice Operated Thermostat,” http://www.accendaproducts.com/kelvin/index.html, printed Dec. 9, 2013, 2 pgs. |
“Control Your Home by Voice or the Web, Anytime Anywhere,” http://www.automatedliving.com, printed Dec. 9, 2013, 1 pg. |
“VoiceIR Environmental Voice Controller Configurator—Broadened Horizons,” http://www.broadenedhorizons.com/voiceir/, Dec. 9, 2013, 17 pgs. |
Voice Recognition & Voice Interactive Products, “http://www.innotechsystems.com/voice.htm,” printed Dec. 9, 2013, 1 pg. |
Telephone Controlled Thermostat, “http://www.rciautomation.com/thermostat_phone.htm,” printed Dec. 9, 2013, 4 pgs. |
http://www.talkingthermostats.com/blind.shtml, printed Dec. 12, 2013, 3 pgs. |
“Siri Proxy-NestLearning Thermostat,” https://github.com/chilitechno/SiriProxy-NestLearningthermostat, printed Jan. 6, 2014, 3 pgs. |
Jacobson, “Design: A Voice Activated Thermostat,” Biomedical Sciences Instrumentation, Technical Papers Composing the Proceedings of the 29th Annual Rocky Mountain Bioengineering Symposium & 29th International ISA Biomedical Sciences Instrumentation Symposium, vol. 28, 1992, pp. 15-19. |
Lacquet et al., “Short Communications, An Affordable Digital-Display-to-Natural-Voice Converter for Visually Impaired Radio Amateurs,” IEEE Transactions on Rehabilitation Engineering, vol. 4, No. No. 4, Dec. 1996, 6 pgs. |
Lee et al., “Fault Detection in an Air-Handling Unit Using Residual and Recursive Parameter Identification Methods,” ASHRAE Transactions vol. 102, Pt. 1, pp. 1-22, 1996. |
Lopez et al., “Temperature and Humidity Laboratory Remote Controller,” Journal of the Mexican Society of Instrumentation, pp. 14-20, 1996. |
Miles et al., “An Audible Thermostat for the Blind or Visually Challenged,” Proceedings of the IEEE 23rd Northeast Bioengineering Conference, pp. 68-69, May 21-22, 1997. |
Piette et al., “Model-Based Chiller Energy Tracking for Performance Assurance at a University Building,” Cool Sense National Forum on Integrated Chiller Retrofits, San Francisco, Calif, LBNL Report-40781, Sep. 1997 17 pgs. |
“Comfort Solutions for Persons Who are Blind or have Low Vision, VIP 3000 Residential Talking Thermostat that Promotes Independent Living,” Talkingthermostats.com, 2003, 2 pgs. |
Venstar, “Comfort Call System ACCO433 Owner's Manual,” Aug. 2007, 24 pgs. |
Walters, “Siri Hack Allows Voice Control of Home Thermostat,” found at http://www.extremetech.com/computing/106073-sir-hack-allows-voice-control-of-home..., Nov. 21, 2011, 2 pgs. |
Watt, “Development of Empirical Temperature and Humidity-Based Degraded-Condition Indicators for Low-Tonnage Air-Conditioners,” Thesis, Dec. 1997, 205 pgs. |
Watt, “Predictive Maintenance Programs (PMP's) in Small HVAC Applications: Analysis of Available Products and Technology,” ESL Report from Paper Prepared for MEEN 662, Apr. 1994, 4 pgs. |
“Stargate Interactive Automation System: JDS Technologies,” Web.archive.org/web20030215020919/http:www.idstechnologies.com/stargate.html, printed May 9, 2013, 9 pgs. |
Nusca, Andrew: “How Apple's Siri really works,” https://zdnet.com/article/how-apples-siri-really-works/, Nov. 3, 2011, 4 pgs. |
Lennox “icomfort Thermostat Manual,” Sep. 2012 edition Retrieved from the internet Jun. 14, 2017 URL:http://airmastersheating.com/Lennox_icomfortWiFi_Manual.pdf, 21 pgs. |
2 gig Technologies, “Go Control Wireless Security System, Installation & Programming Instructions,” 2010, 52 pgs. |
Extended European Search Report for European Patent Application 18189290.2, dated Nov. 13, 2018, 6 pgs. |
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20210185434 A1 | Jun 2021 | US |
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Parent | 16694078 | Nov 2019 | US |
Child | 17182381 | US | |
Parent | 15833045 | Dec 2017 | US |
Child | 16694078 | US |