Yuzuru Yanagisawa

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Fujisawa, JP

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Patents Grantslast 30 patents

Information Patent Grant
Record disk and method for producing the same with constant width g...
- Patent number 4,152,726
- Issue date May 1, 1979
- Sony Corporation
- Chiaki Kojima
- G11 - INFORMATION STORAGE
Information Patent Grant
Linear method of optically recording a video or other signal
- Patent number 4,150,398
- Issue date Apr 17, 1979
- Sony Corporation
- Chiaki Kojima
- G11 - INFORMATION STORAGE