Akira Hatakeyama

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Servo control apparatus for adjusting the phase of a rotary head as...
- Patent number 4,322,757
- Issue date Mar 30, 1982
- Sony Corporation
- Akira Hatakeyama
- G11 - INFORMATION STORAGE
Information Patent Grant
Rotational direction indicating apparatus
- Patent number 4,259,625
- Issue date Mar 31, 1981
- Sony Corporation
- Akira Hatakeyama
- G11 - INFORMATION STORAGE