Masao Sakuyama

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Tokorozawa, JP

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Patents Grantslast 30 patents

Information Patent Grant
Radio corrected clock
- Patent number 7,408,845
- Issue date Aug 5, 2008
- Citizen Holdings Co., Ltd.
- Takashi Ihara
- G04 - HOROLOGY
Information Patent Grant
Electronic timepiece, information processing device, method of disp...
- Patent number 6,876,602
- Issue date Apr 5, 2005
- Citizen Watch Co., Ltd.
- Masakazu Ichikawa
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Grant
Data transmission/reception system for electronic timepieces
- Patent number 6,754,138
- Issue date Jun 22, 2004
- Citizen Watch Co., Ltd.
- Masao Sakuyama
- G04 - HOROLOGY
Information Patent Grant
Data transmission/reception system for electronic timepieces
- Patent number 6,522,601
- Issue date Feb 18, 2003
- Citizen Watch Co., Ltd.
- Masao Sakuyama
- G04 - HOROLOGY
Information Patent Grant
Electronic watch with meter function and display means
- Patent number 6,490,230
- Issue date Dec 3, 2002
- Citizen Watch Co., Ltd.
- Masao Sakuyama
- B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
Information Patent Grant
Electronic watch and drive method therefor
- Patent number 6,483,781
- Issue date Nov 19, 2002
- Citizen Watch Co., Ltd.
- Kiyotaka Igarashi
- G04 - HOROLOGY
Information Patent Grant
Display device
- Patent number 4,516,120
- Issue date May 7, 1985
- Citizen Watch Company Limited
- Masao Sakuyama
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS

Patents Applicationslast 30 patents

Information Patent Application
Radio corrected clock
- Publication number 20040202051
- Publication date Oct 14, 2004
- Takashi Ihara
- G04 - HOROLOGY
Information Patent Application
Electronic timepiece, information processing device, method of disp...
- Publication number 20030235117
- Publication date Dec 25, 2003
- CITIZEN WATCH CO., LTD.
- Masakazu Ichikawa
- G04 - HOROLOGY
Information Patent Application
Data transmission/reception system for electronic timepieces
- Publication number 20020141290
- Publication date Oct 3, 2002
- CITIZEN WATCH CO., LTD.
- MASAO SAKUYAMA
- G04 - HOROLOGY
Information Patent Application
DATA TRANSMISSION/RECEPTION SYSTEM FOR ELECTRONIC TIMEPIECES
- Publication number 20020136092
- Publication date Sep 26, 2002
- CITIZEN WATCH CO., LTD.
- MASAO SAKUYAMA
- G04 - HOROLOGY
Information Patent Application
Electronic watch and drive method therefor
- Publication number 20010043512
- Publication date Nov 22, 2001
- CITIZEN WATCH CO., LTD.
- Kiyotaka Igarashi
- G04 - HOROLOGY