Keizo Anan

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Tsukuba, JP

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Patents Grantslast 30 patents

Information Patent Grant
Contact lens
- Patent number 5,883,152
- Issue date Mar 16, 1999
- Nippon Oil and Fats Co., Ltd.
- Keizo Anan
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Transparent optical article and process for preparing same
- Patent number 4,948,854
- Issue date Aug 14, 1990
- Naoyuki Amaya
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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-...