Tamotsu Kurosawa

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Saitama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Crystal unit having stacked structure
- Patent number 7,564,177
- Issue date Jul 21, 2009
- Nihon Dempa Kogyo Co., Ltd.
- Masahiro Yoshimatsu
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Method of manufacturing thin quartz crystal wafer
- Patent number 7,174,620
- Issue date Feb 13, 2007
- Nihon Dempa Kogyo Co., Ltd.
- Akio Chiba
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Grant
Tuning fork type crystal unit and bar type crystal unit
- Patent number 6,930,440
- Issue date Aug 16, 2005
- Nihon Dempa Kogyo Co., Ltd.
- Akio Chiba
- H03 - BASIC ELECTRONIC CIRCUITRY

Patents Applicationslast 30 patents

Information Patent Application
CRYSTAL UNIT HAVING STACKED STRUCTURE
- Publication number 20080150398
- Publication date Jun 26, 2008
- NIHON DEMPA KOGYO CO., LTD.
- Masahiro YOSHIMATSU
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Method of manufacturing thin quartz crystal wafer
- Publication number 20040135467
- Publication date Jul 15, 2004
- Nihon Dempa Kogyo Co., Ltd.
- Akio Chiba
- C30 - CRYSTAL GROWTH
Information Patent Application
Tuning fork type crystal unit and bar type crystal unit
- Publication number 20040085004
- Publication date May 6, 2004
- Nihon Dempa Kogyo Co., Ltd.
- Akio Chiba
- H03 - BASIC ELECTRONIC CIRCUITRY