Ryoichi Ichikawa

Person

Saitama, JP

People

Patents Grantslast 30 patents

Information Patent Grant
External force detecting device and external force detecting sensor
- Patent number 8,966,980
- Issue date Mar 3, 2015
- Nihon Dempa Kogyo Co., Ltd.
- Mitsuaki Koyama
- G01 - MEASURING TESTING
Information Patent Grant
Acceleration measuring apparatus
- Patent number 8,919,201
- Issue date Dec 30, 2014
- Nihon Dempa Kogyo Co., Ltd.
- Mitsuaki Koyama
- G01 - MEASURING TESTING
Information Patent Grant
External force detection apparatus and external force detection sensor
- Patent number 8,890,391
- Issue date Nov 18, 2014
- Nihon Dempa Kogyo Co., Ltd.
- Mitsuaki Koyama
- G01 - MEASURING TESTING
Information Patent Grant
Piezoelectric vibrating devices including respective packages in wh...
- Patent number 8,823,247
- Issue date Sep 2, 2014
- Nihon Dempa Kogyo Co., Ltd.
- Ryoichi Ichikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Piezoelectric vibrating devices and methods for manufacturing same
- Patent number 8,729,775
- Issue date May 20, 2014
- Nihon Dempa Kogyo Co., Ltd.
- Mitoshi Umeki
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Method of manufacturing the piezoelectric device and the same
- Patent number 8,618,721
- Issue date Dec 31, 2013
- Nihon Dempa Kogyo Co., Ltd.
- Ryoichi Ichikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Tuning-fork type piezoelectric vibrating piece with enhanced freque...
- Patent number 8,610,338
- Issue date Dec 17, 2013
- Nihon Dempa Kogyo Co., Ltd.
- Ryoichi Ichikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Methods for manufacturing piezoelectric devices
- Patent number 8,549,717
- Issue date Oct 8, 2013
- Nihon Dempa Kogyo Co., Ltd.
- Ryoichi Ichikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Surface-mountable piezoelectric devices including eutectic-bonded p...
- Patent number 8,531,092
- Issue date Sep 10, 2013
- Nihon Dempa Kogyo Co., Ltd.
- Ryoichi Ichikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Methods for manufacturing piezoelectric vibrating pieces
- Patent number 8,429,800
- Issue date Apr 30, 2013
- Nihon Dempa Kogyo Co., Ltd.
- Hiroshi Kawahara
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Impact-resistant piezoelectric devices
- Patent number 8,405,284
- Issue date Mar 26, 2013
- Nihon Dempa Kogyo Co. Ltd.
- Ryoichi Ichikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Piezoelectric devices and methods for manufacturing same
- Patent number 8,382,995
- Issue date Feb 26, 2013
- Nihon Dempa Kogyo Co., Ltd.
- Ryoichi Ichikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Piezoelectric frame and piezoelectric device incorporating same
- Patent number 8,347,719
- Issue date Jan 8, 2013
- Nihon Dempa Kogyo Co., Ltd.
- Ryoichi Ichikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Manufacturing methods of piezoelectric devices
- Patent number 8,303,755
- Issue date Nov 6, 2012
- Nihon Dempa Kogyo Co., Ltd.
- Ryoichi Ichikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Crystal device
- Patent number 8,278,798
- Issue date Oct 2, 2012
- Nihon Dempa Kogyo Co., Ltd.
- Ryoichi Ichikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Piezoelectric devices and methods for manufacturing same
- Patent number 8,227,958
- Issue date Jul 24, 2012
- Nihon Dempa Kogyo Co., Ltd.
- Takahiro Inoue
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Piezoelectric frame surrounding a piezoelectric vibrating piece and...
- Patent number 8,154,178
- Issue date Apr 10, 2012
- Nihon Dempa Kogyo Co., Ltd.
- Ryoichi Ichikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Tuning-fork-type piezoelectric vibrating piece with root portions h...
- Patent number 8,093,787
- Issue date Jan 10, 2012
- Nihon Dempa Kogyo Co., Ltd.
- Ryoichi Ichikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Piezoelectric devices exhibiting reduced CI degradation
- Patent number 8,018,126
- Issue date Sep 13, 2011
- Nihon Dempa Kogyo Co., Ltd.
- Mitoshi Umeki
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Piezoelectric vibrating pieces and piezoelectric devices
- Patent number 7,902,729
- Issue date Mar 8, 2011
- Nihon Dempa Kogyo Co., Ltd.
- Shingo Kawanishi
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Tuning-fork type piezoelectric unit
- Patent number 7,888,850
- Issue date Feb 15, 2011
- Nihon Dempa Kogyo Co., Ltd.
- Ryoichi Ichikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Tuning fork type quartz crystal resonator
- Patent number 7,859,173
- Issue date Dec 28, 2010
- Nihon Dempa Kogyo Co. Ltd.
- Ryoichi Ichikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Manufacturing method of tuning-fork type quartz crystal resonator
- Patent number 7,544,464
- Issue date Jun 9, 2009
- Nihon Dempa Kogyo Co., Ltd.
- Ryoichi Ichikawa
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Grant
Method and apparatus for correcting drift during automated FIB proc...
- Patent number 7,361,909
- Issue date Apr 22, 2008
- Jeol Ltd.
- Ryoichi Ichikawa
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
ELECTRONIC DEVICE AND METHOD FOR FABRICATING THE SAME
- Publication number 20140291011
- Publication date Oct 2, 2014
- NIHON DEMPA KOGYO CO., LTD.
- MASAHIRO YOSHIMATSU
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
ELECTRONIC DEVICE AND METHOD FOR FABRICATING THE SAME
- Publication number 20140292143
- Publication date Oct 2, 2014
- NIHON DEMPA KOGYO CO., LTD.
- Ryoichi Ichikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
PIEZOELECTRIC DEVICE
- Publication number 20130241362
- Publication date Sep 19, 2013
- NIHON DEMPA KOGYO CO., LTD.
- Ryoichi Ichikawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
PIEZOELECTRIC DEVICE
- Publication number 20130207523
- Publication date Aug 15, 2013
- NIHON DEMPA KOGYO CO., LTD.
- Ryoichi Ichikawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Tuning-Fork Type Piezoelectric Vibrating Piece and Piezoelectric De...
- Publication number 20130119823
- Publication date May 16, 2013
- NIHON DEMPA KOGYO CO., LTD.
- Ryoichi ICHIKAWA
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Application
CRYSTAL RESONATOR
- Publication number 20130049543
- Publication date Feb 28, 2013
- NIHON DEMPA KOGYO CO., LTD.
- Yoshiaki Amano
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
PIEZOELECTRIC VIBRATING DEVICE AND METHOD FOR MANUFACTURING SAME
- Publication number 20130002096
- Publication date Jan 3, 2013
- NIHON DEMPA KOGYO CO., LTD.
- Mitoshi Umeki
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Application
EXTERNAL FORCE DETECTION APPARATUS AND EXTERNAL FORCE DETECTION SENSOR
- Publication number 20120326566
- Publication date Dec 27, 2012
- NIHON DEMPA KOGYO CO., LTD.
- MITSUAKI KOYAMA
- G01 - MEASURING TESTING
Information Patent Application
ACCELERATION MEASURING APPARATUS
- Publication number 20120312097
- Publication date Dec 13, 2012
- NIHON DEMPA KOGYO CO., LTD.
- MITSUAKI KOYAMA
- G01 - MEASURING TESTING
Information Patent Application
PIEZOELECTRIC DEVICE AND MANUFACTURING METHOD THEREOF
- Publication number 20120306320
- Publication date Dec 6, 2012
- NIHON DEMPA KOGYO CO., LTD.
- Ryoichi Ichikawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
External force detecting device and external force detecting sensor
- Publication number 20120180568
- Publication date Jul 19, 2012
- NIHON DEMPA KOGYO CO., LTD.
- Mitsuaki KOYAMA
- G01 - MEASURING TESTING
Information Patent Application
Method for Manufacturing a Piezoelectric Device and the Same
- Publication number 20120068579
- Publication date Mar 22, 2012
- NIHON DEMPA KOGYO CO., LTD.
- Ryoichi Ichikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
PIEZOELECTRIC VIBRATING DEVICES AND METHODS FOR MANUFACTURING SAME
- Publication number 20120049695
- Publication date Mar 1, 2012
- Nihon Dempa Kogyo Co., Ltd.
- Ryoichi Ichikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
PIEZOELECTRIC VIBRATING DEVICES AND METHODS FOR MANUFACTURING SAME
- Publication number 20120043860
- Publication date Feb 23, 2012
- Nihon Dempa Kogyo Co., Ltd.
- Ryoichi Ichikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Method of Manufacturing the Piezoelectric Device and the Same
- Publication number 20120043859
- Publication date Feb 23, 2012
- NIHON DEMPA KOGYO CO., LTD.
- Ryoichi Ichikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
PIEZOELECTRIC VIBRATING DEVICES AND METHODS FOR MANUFACTURING SAME
- Publication number 20110316390
- Publication date Dec 29, 2011
- Nihon Dempa Kogyo Co., Ltd.
- Mitoshi Umeki
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
SURFACE-MOUNTABLE PIEZOELECTRIC DEVICES INCLUDING EUTECTIC-BONDED P...
- Publication number 20110260585
- Publication date Oct 27, 2011
- Nihon Dempa Kogyo Co., Ltd.
- Ryoichi Ichikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Crystal device
- Publication number 20110140572
- Publication date Jun 16, 2011
- NIHON DEMPA KOGYO CO., LTD.
- Ryoichi Ichikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
PIEZOELECTRIC VIBRATING DEVICES AND METHODS FOR MANUFACTURING SAME
- Publication number 20110068659
- Publication date Mar 24, 2011
- Nihon Dempa Kogyo Co., Ltd.
- Ryoichi Ichikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
PIEZOELECTRIC VIBRATING DEVICES AND METHODS FOR MANUFACTURING SAME
- Publication number 20110062828
- Publication date Mar 17, 2011
- Nihon Dempa Kogyo Co., Ltd.
- Hiroshi Kawahara
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
PIEZOELECTRIC DEVICES AND METHODS FOR MANUFACTURING SAME
- Publication number 20110062827
- Publication date Mar 17, 2011
- Nihon Dempa Kogyo Co., Ltd.
- Ryoichi Ichikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
PIEZOELECTRIC DEVICES EXHIBITING REDUCED CI DEGRADATION
- Publication number 20110062826
- Publication date Mar 17, 2011
- Nihon Dempa Kogyo Co., Ltd.
- Mitoshi Umeki
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
PIEZOELECTRIC DEVICES AND METHODS FOR MANUFACTURING SAME
- Publication number 20100201221
- Publication date Aug 12, 2010
- Nihon Dempa Kogyo Co., Ltd.
- Takahiro Inoue
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Tuning-Fork Type Piezoelectric Vibrating Piece and Piezoelectric De...
- Publication number 20100156237
- Publication date Jun 24, 2010
- NIHON DEMPA KOGYO CO., LTD.
- Ryoichi ICHIKAWA
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Piezoelectric Frame, Piezoelectric Device and Manufacturing Method...
- Publication number 20100147074
- Publication date Jun 17, 2010
- NIHON DEMPA KOGYO CO., LTD.
- Ryoichi Ichikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Impact-resistant piezoelectric devices
- Publication number 20100148634
- Publication date Jun 17, 2010
- Nihon Dempa Kogyo Co., Ltd.
- Ryoichi Ichikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
TUNING-FORK-TYPE PIEZOELECTRIC VIBRATING PIECE AND METHOD OF MANUFA...
- Publication number 20100084949
- Publication date Apr 8, 2010
- Nihon Dempa Kogyo Co., Ltd.
- Ryoichi Ichikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
MANUFACTURING METHODS OF PIEZOELECTRIC DEVICES
- Publication number 20100084086
- Publication date Apr 8, 2010
- Nihon Dempa Kogyo Co., Ltd.
- Ryoichi Ichikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
PIEZOELECTRIC DEVICES
- Publication number 20100033061
- Publication date Feb 11, 2010
- Nihon Dempa Kogyo Co., Ltd.
- Ryoichi Ichikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Manufacturing method of tuning-fork type quartz crystal resonator
- Publication number 20090236950
- Publication date Sep 24, 2009
- Nihon Dempa Kogyo Co., Ltd.
- Ryoichi Ichikawa
- H03 - BASIC ELECTRONIC CIRCUITRY

Ryoichi Ichikawa

Person

Patents Grantslast 30 patents

External force detecting device and external force detecting sensor

Acceleration measuring apparatus

External force detection apparatus and external force detection sensor

Piezoelectric vibrating devices including respective packages in wh...

Piezoelectric vibrating devices and methods for manufacturing same

Method of manufacturing the piezoelectric device and the same

Tuning-fork type piezoelectric vibrating piece with enhanced freque...

Methods for manufacturing piezoelectric devices

Surface-mountable piezoelectric devices including eutectic-bonded p...

Methods for manufacturing piezoelectric vibrating pieces

Impact-resistant piezoelectric devices

Piezoelectric devices and methods for manufacturing same

Piezoelectric frame and piezoelectric device incorporating same

Manufacturing methods of piezoelectric devices

Crystal device

Piezoelectric devices and methods for manufacturing same

Piezoelectric frame surrounding a piezoelectric vibrating piece and...

Tuning-fork-type piezoelectric vibrating piece with root portions h...

Piezoelectric devices exhibiting reduced CI degradation

Piezoelectric vibrating pieces and piezoelectric devices

Tuning-fork type piezoelectric unit

Tuning fork type quartz crystal resonator

Manufacturing method of tuning-fork type quartz crystal resonator

Method and apparatus for correcting drift during automated FIB proc...

Patents Applicationslast 30 patents

ELECTRONIC DEVICE AND METHOD FOR FABRICATING THE SAME

ELECTRONIC DEVICE AND METHOD FOR FABRICATING THE SAME

PIEZOELECTRIC DEVICE

PIEZOELECTRIC DEVICE

Tuning-Fork Type Piezoelectric Vibrating Piece and Piezoelectric De...

CRYSTAL RESONATOR

PIEZOELECTRIC VIBRATING DEVICE AND METHOD FOR MANUFACTURING SAME

EXTERNAL FORCE DETECTION APPARATUS AND EXTERNAL FORCE DETECTION SENSOR

ACCELERATION MEASURING APPARATUS

PIEZOELECTRIC DEVICE AND MANUFACTURING METHOD THEREOF

External force detecting device and external force detecting sensor

Method for Manufacturing a Piezoelectric Device and the Same

PIEZOELECTRIC VIBRATING DEVICES AND METHODS FOR MANUFACTURING SAME

PIEZOELECTRIC VIBRATING DEVICES AND METHODS FOR MANUFACTURING SAME

Method of Manufacturing the Piezoelectric Device and the Same

PIEZOELECTRIC VIBRATING DEVICES AND METHODS FOR MANUFACTURING SAME

SURFACE-MOUNTABLE PIEZOELECTRIC DEVICES INCLUDING EUTECTIC-BONDED P...

Crystal device

PIEZOELECTRIC VIBRATING DEVICES AND METHODS FOR MANUFACTURING SAME

PIEZOELECTRIC VIBRATING DEVICES AND METHODS FOR MANUFACTURING SAME

PIEZOELECTRIC DEVICES AND METHODS FOR MANUFACTURING SAME

PIEZOELECTRIC DEVICES EXHIBITING REDUCED CI DEGRADATION

PIEZOELECTRIC DEVICES AND METHODS FOR MANUFACTURING SAME

Tuning-Fork Type Piezoelectric Vibrating Piece and Piezoelectric De...

Piezoelectric Frame, Piezoelectric Device and Manufacturing Method...

Impact-resistant piezoelectric devices

TUNING-FORK-TYPE PIEZOELECTRIC VIBRATING PIECE AND METHOD OF MANUFA...

MANUFACTURING METHODS OF PIEZOELECTRIC DEVICES

PIEZOELECTRIC DEVICES

Manufacturing method of tuning-fork type quartz crystal resonator