Takayuki Hasumi

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Saitama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Radio-controlled timepiece
- Patent number 8,295,128
- Issue date Oct 23, 2012
- Citizen Holdings Co., Ltd.
- Takayuki Hasumi
- G04 - HOROLOGY
Information Patent Grant
Analog electronic watch
- Patent number 7,961,557
- Issue date Jun 14, 2011
- Citizen Holdings Co., Ltd.
- Teruhiko Fujii
- G04 - HOROLOGY
Information Patent Grant
Electronic device with solar cell
- Patent number 7,746,731
- Issue date Jun 29, 2010
- Citizen Holdings Co., Ltd.
- Eiki Murakami
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Grant
Switch connecting structure for timepiece
- Patent number 6,846,998
- Issue date Jan 25, 2005
- Citizen Watch Co., Ltd.
- Takayuki Hasumi
- G04 - HOROLOGY
Information Patent Grant
Self-winding electric power generation watch with additional function
- Patent number 6,244,742
- Issue date Jun 12, 2001
- Citizen Watch Co., Ltd.
- Shinichi Yamada
- G04 - HOROLOGY
Information Patent Grant
Watch with extended dial
- Patent number 5,898,646
- Issue date Apr 27, 1999
- Citizen Watch Co., Ltd.
- Masahiro Kasaya
- G04 - HOROLOGY
Information Patent Grant
Structure of a watch and assembling method thereof
- Patent number 5,592,443
- Issue date Jan 7, 1997
- Citizen Watch Co., Ltd.
- Masahiro Kasaya
- G04 - HOROLOGY

Patents Applicationslast 30 patents

Information Patent Application
RADIO-CONTROLLED TIMEPIECE
- Publication number 20100074059
- Publication date Mar 25, 2010
- Citizen Holding Co., Ltd
- Takayuki Hasumi
- G04 - HOROLOGY
Information Patent Application
Analog Electronic Watch
- Publication number 20090016172
- Publication date Jan 15, 2009
- Teruhiko Fujii
- G04 - HOROLOGY
Information Patent Application
Electronic Device with Solar Cell
- Publication number 20070240753
- Publication date Oct 18, 2007
- Eiki Murakami
- G04 - HOROLOGY
Information Patent Application
Switch connecting structure for timepiece
- Publication number 20030143897
- Publication date Jul 31, 2003
- Takayuki Hasumi
- G04 - HOROLOGY