Keiichiro Doi

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Yokohama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Stylus for capacity change detection type disc system
- Patent number 4,646,282
- Issue date Feb 24, 1987
- Victor Company of Japan, Limited
- Hideaki Mizuno
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Capacitance detection type record stylus and method for making the...
- Patent number 4,410,974
- Issue date Oct 18, 1983
- Victor Company of Japan, Limited
- Keiji Segawa
- C30 - CRYSTAL GROWTH