Katsumi Watanabe

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Kawasaki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Cartridge record phonograph
- Patent number D254785
- Issue date Apr 22, 1980
- Yugen Kaisha Watanabe Kenkyusho
- Katsumi Watanabe
- D14 - Recording, communication, or information retrieval equipment