Tomoyoshi Sasakawa

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical recording medium
- Patent number 5,855,979
- Issue date Jan 5, 1999
- Mitsui Chemicals, Inc.
- Hideki Umehara
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical recording medium and production thereof
- Patent number 5,486,396
- Issue date Jan 23, 1996
- Mitsui Toatsu Chemicals, Incorporated
- Tadahiko Mizukuki
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Optical recording medium and production thereof
- Patent number 5,424,102
- Issue date Jun 13, 1995
- Mitsui Toatsu Chemicals, Inc.
- Tadahiko Mizukuki
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Optical recording medium
- Patent number 5,369,321
- Issue date Nov 29, 1994
- Mitsui Toatsu Chemicals, Inc.
- Tadashi Koike
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical recording medium
- Patent number 5,283,094
- Issue date Feb 1, 1994
- Mitsui Toatsu Chemicals, Inc.
- Tomoyoshi Sasakawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical recording medium and process for fabricating the same
- Patent number 4,977,064
- Issue date Dec 11, 1990
- Mitsui Toatsu Chemicals, Incorporated
- Hiroshi Sukawa
- G11 - INFORMATION STORAGE