Toshihisa Sakai

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Gifu, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method for marking a water-absorptive contact lens: dyeing dry lens...
- Patent number 5,244,470
- Issue date Sep 14, 1993
- Menicon Co., Ltd.
- Koji Onda
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL