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Patents Grants
last 30 patents
Information
Patent Grant
Vibration transmission mechanism for a phonograph
Patent number
4,061,343
Issue date
Dec 6, 1977
Yugen Kaisha Watanabe Kenkyusho
Katsumi Watanabe
G11 - INFORMATION STORAGE
Information
Patent Grant
Toy phonograph with automatic pickup arm return means
Patent number
4,027,887
Issue date
Jun 7, 1977
Yugen Kaisha Watanabe Kenkyusho
Katsumi Watanabe
G11 - INFORMATION STORAGE
Information
Patent Grant
Miniature toy sound-reproducing device
Patent number
4,004,815
Issue date
Jan 25, 1977
Yugen Kaisha Watanabe Kenkyusho
Katsumi Watanabe
A63 - SPORTS GAMES AMUSEMENTS
Information
Patent Grant
Simplified phonograph
Patent number
3,992,016
Issue date
Nov 16, 1976
Yugen Kaisha Watanabe Kenkyusho
Katsumi Watanabe
G11 - INFORMATION STORAGE