Yutaka Koyama

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Tachikawa-shi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Coupling device and electronic device
- Patent number 8,707,516
- Issue date Apr 29, 2014
- NEC Corporation
- Yutaka Koyama
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Waterproof structure and electronic equipment
- Patent number 8,548,159
- Issue date Oct 1, 2013
- NEC Corporation
- Yasuhiko Kawasaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Waterproof structure and electronic equipment
- Patent number 8,259,930
- Issue date Sep 4, 2012
- Casio Hitachi Mobile Communications Co., Ltd.
- Yasuhiko Kawasaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Waterproof Structure and Electronic Equipment
- Publication number 20120000687
- Publication date Jan 5, 2012
- Casio Hitachi Mobile Communications Co., Ltd.
- Yasuhiko Kawasaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Coupling Device and Electronic Device
- Publication number 20090178240
- Publication date Jul 16, 2009
- Casio Hitachi Mobile Communications Co., Ltd.
- Yutaka Koyama
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Application
Waterproof Structure and Electronic Equipment
- Publication number 20090101384
- Publication date Apr 23, 2009
- Casio Hitachi Mobile Communications Co., Ltd.
- Yasuhiko Kawasaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE