Sumio Nakahashi

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Patents Grantslast 30 patents

Information Patent Grant
Method of manufacturing a foam transparent organic glass plate
- Patent number 5,269,977
- Issue date Dec 14, 1993
- Nissen Kagakukogyo K.K.
- Sumio Nakahashi
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Molding of light reflector
- Patent number 4,931,227
- Issue date Jun 5, 1990
- Nissan Chemical Industry Co., Ltd.
- Sumio Nakahashi
- B44 - DECORATIVE ARTS
Information Patent Grant
Light reflection material, its manufacture and application
- Patent number 4,830,899
- Issue date May 16, 1989
- Nissen Chemical Industry Co., Ltd.
- Sumio Nakahashi
- B44 - DECORATIVE ARTS