Hiroshi Kawashima

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Patents Grantslast 30 patents

Information Patent Grant
Coated synthetic resin lens
- Patent number 5,015,523
- Issue date May 14, 1991
- Seiko Epson Corporation
- Hiroshi Kawashima
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Contact lens article made of silicon- and fluorine-containing resin
- Patent number 4,933,406
- Issue date Jun 12, 1990
- Nippon Oil and Fats Co., Ltd.
- Keizo Anan
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Synthetic resin ophthalmic lens having a surface hard coat
- Patent number 4,611,892
- Issue date Sep 16, 1986
- Seiko Epson Corporation
- Hiroshi Kawashima
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Photochromic coating composition and photochromic synthetic resin o...
- Patent number 4,556,605
- Issue date Dec 3, 1985
- Kabushiki Kaisha Suwa Seikosha
- Takao Mogami
- G02 - OPTICS