Katsumi Matsumoto

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Patents Grantslast 30 patents

Information Patent Grant
Swimming goggles
- Patent number 7,490,365
- Issue date Feb 17, 2009
- Yamamoto Kogaku Co., Ltd.
- Katsumi Matsumoto
- A63 - SPORTS GAMES AMUSEMENTS

Patents Applicationslast 30 patents

Information Patent Application
Swimming goggles
- Publication number 20050241051
- Publication date Nov 3, 2005
- Katsumi Matsumoto
- A63 - SPORTS GAMES AMUSEMENTS