Junichi Akamatsu

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Saitama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical recording material and method for producing same
- Patent number 5,474,873
- Issue date Dec 12, 1995
- Sony Corporation
- Junichi Akamatsu
- G11 - INFORMATION STORAGE
Information Patent Grant
Multiple layer optical record medium with protective layers and met...
- Patent number 5,364,735
- Issue date Nov 15, 1994
- Sony Corporation
- Junichi Akamatsu
- G11 - INFORMATION STORAGE
Information Patent Grant
Optically recordable carrier
- Patent number 4,807,220
- Issue date Feb 21, 1989
- Sony Corp.
- Seiichi Miyai
- G11 - INFORMATION STORAGE
Information Patent Grant
Information recording medium including antimony-selenium compounds
- Patent number 4,633,273
- Issue date Dec 30, 1986
- Sony Corporation
- Kenjiro Watanabe
- G11 - INFORMATION STORAGE
Information Patent Grant
Information recording medium
- Patent number 4,525,412
- Issue date Jun 25, 1985
- Sony Corporation
- Yasuaki Nakane
- G11 - INFORMATION STORAGE