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Waterloo, CA
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Patents Grants
last 30 patents
Information
Patent Grant
System, apparatus and method for establishing a call from a mobile...
Patent number
9,167,616
Issue date
Oct 20, 2015
BlackBerry Limited
Michael Elizarov
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method, system and apparatus for managing call handoff
Patent number
8,718,019
Issue date
May 6, 2014
BlackBerry Limited
Ximing Zeng
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Error correction for DTMF corruption on uplink
Patent number
8,615,280
Issue date
Dec 24, 2013
BlackBerry Limited
Valentina Iquorevna Kramarenko
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
DTMF signalling between mobile and server
Patent number
8,606,256
Issue date
Dec 10, 2013
BlackBerry Limited
Zhigang Ruan
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
System and method for alternating between in-band and out-of-band c...
Patent number
8,452,291
Issue date
May 28, 2013
Research in Motion Limited
Dapeng Gao
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Error correction for DTMF corruption on uplink
Patent number
8,423,102
Issue date
Apr 16, 2013
Research In Motion Limited
Valentina Iqorevna Kramarenko
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
DTMF signalling between mobile and server
Patent number
8,346,235
Issue date
Jan 1, 2013
Research in Motion Limited
Zhigang Ruan
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Error correction for DTMF corruption on uplink
Patent number
8,233,951
Issue date
Jul 31, 2012
Research In Motion Limited
Valentina Iqorevna Kramarenko
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
SYSTEM, APPARATUS AND METHOD FOR ESTABLISHING A CALL FROM A MOBILE...
Publication number
20140126427
Publication date
May 8, 2014
Research in Motion Limited
Michael ELIZAROV
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
ERROR CORRECTION FOR DTMF CORRUPTION ON UPLINK
Publication number
20130217374
Publication date
Aug 22, 2013
Research in Motion Limited
Valentina Iqorevna Kramarenko
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
DTMF SIGNALLING BETWEEN MOBILE AND SERVER
Publication number
20130079043
Publication date
Mar 28, 2013
Research in Motion Limited
ZHIGANG RUAN
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
METHOD, SYSTEM AND APPARATUS FOR MANAGING CALL HANDOFF
Publication number
20120269171
Publication date
Oct 25, 2012
Research in Motion Limited
Ximing ZENG
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
ERROR CORRECTION FOR DTMF CORRUPTION ON UPLINK
Publication number
20120258698
Publication date
Oct 11, 2012
Research in Motion Limited
Valentina Iqorevna Kramarenko
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
METHOD, SYSTEM AND APPARATUS FOR MANAGING CALL HANDOFF
Publication number
20110261784
Publication date
Oct 27, 2011
Research in Motion Limited
Ximing ZENG
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
System and Method for Alternating Between In-Band and Out-of-Band C...
Publication number
20110189985
Publication date
Aug 4, 2011
Research in Motion Limited
Dapeng Gao
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
ERROR CORRECTION FOR DTMF CORRUPTION ON UPLINK
Publication number
20110183653
Publication date
Jul 28, 2011
Research In Motion Limited
Valentina Iqorevna Kramarenko
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
DTMF SIGNALLING BETWEEN MOBILE AND SERVER
Publication number
20110183649
Publication date
Jul 28, 2011
Research In Motion Limited
ZHIGANG RUAN
H04 - ELECTRIC COMMUNICATION TECHNIQUE