Yoshisuke Yamakawa

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Magnetic recording media and method for making them
- Patent number 5,532,041
- Issue date Jul 2, 1996
- TDK Corporation
- Yoshihiro Honjo
- G11 - INFORMATION STORAGE
Information Patent Grant
Lapping tape
- Patent number 5,110,659
- Issue date May 5, 1992
- TDK Corporation
- Yoshisuke Yamakawa
- B24 - GRINDING POLISHING
Information Patent Grant
Magnetic recording media having two magnetic layers; the first for...
- Patent number 5,043,210
- Issue date Aug 27, 1991
- TDK Corporation
- Yoshisuke Yamakawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Method of making a magnetic recording medium
- Patent number 4,684,546
- Issue date Aug 4, 1987
- TDK Corporation
- Yasumichi Tokuoka
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording medium
- Patent number 4,663,246
- Issue date May 5, 1987
- TDK Corporation
- Yasumichi Tokuoka
- G11 - INFORMATION STORAGE