Yugen Kaisha Watanabe Kenkyusho

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Kawasaki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Simplified record player
- Patent number 4,286,789
- Issue date Sep 1, 1981
- Yugen Kaisha Watanabe Kenkyusho
- Katsumi Watanabe
- G11 - INFORMATION STORAGE
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
Information Patent Grant
Simplified structure of toy phonograph
- Patent number 4,157,832
- Issue date Jun 12, 1979
- Yugen Kaisha Watanabe Kenkyusho
- Katsumi Watanabe
- G11 - INFORMATION STORAGE
Information Patent Grant
Toy record player
- Patent number 4,150,831
- Issue date Apr 24, 1979
- Yugen Kaisha Watanabe Kenkyusho
- Katsumi Watanabe
- G11 - INFORMATION STORAGE
Information Patent Grant
Mechanism for causing returning movement of tone arm of toy phonograph
- Patent number 4,150,832
- Issue date Apr 24, 1979
- Yugen Kaisha Watanabe Kenkyusho
- Katsumi Watanabe
- G11 - INFORMATION STORAGE
Information Patent Grant
Phonograph for use with record cartridges
- Patent number 4,123,065
- Issue date Oct 31, 1978
- Yugen Kaisha Watanabe Kenkyusho
- Katsumi Watanabe
- G11 - INFORMATION STORAGE
Information Patent Grant
Switch mechanism for simple phonograph
- Patent number 4,107,489
- Issue date Aug 15, 1978
- Yugen Kaisha Watanabe Kenkyusho
- Katsumi Watanabe
- G11 - INFORMATION STORAGE