Yoshio Onizawa

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Hyogo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Process for producing plastic substrate for optical disks
- Patent number 4,986,938
- Issue date Jan 22, 1991
- Daicel Chemical Industries Ltd.
- Akihiro Izuka
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Plastic substrate for optical disk and process for producing the same
- Patent number 4,841,501
- Issue date Jun 20, 1989
- Daicel Chemical Industries, Ltd.
- Akihiro Izuka
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Large diameter optical disk substrate made of polycarbonate
- Patent number 4,764,331
- Issue date Aug 16, 1988
- Daicel Chemical Industries, Ltd.
- Shinji Tokuhara
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Injection mold for an optical disk
- Patent number 4,741,689
- Issue date May 3, 1988
- Daicel Chemical Industries, Ltd.
- Yoshio Onizawa
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Metal mold and stamper for injection molding of a plastic disc for...
- Patent number 4,627,809
- Issue date Dec 9, 1986
- Daicel Chemical Industries, Ltd.
- Norio Okabayashi
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL