Koji Umezawa

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Kanagawa, JP

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Patents Grantslast 30 patents

Information Patent Grant
Automatic-reverse tape player with a switchable rotational gear ass...
- Patent number 5,668,681
- Issue date Sep 16, 1997
- Sony Corporation
- Koji Umezawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Loading apparatus for tape cassette including safety mechanism for...
- Patent number 5,541,786
- Issue date Jul 30, 1996
- Sony Corporation
- Koji Umezawa
- G11 - INFORMATION STORAGE