Keiji Yamashita

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Kasugai, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of molding ophthalmic lens product, and mold assembly used i...
- Patent number 6,355,190
- Issue date Mar 12, 2002
- Menicon Co., Ltd.
- Tatsuya Ojio
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Device for molding ophthalmic lens material and method of molding t...
- Patent number 6,258,299
- Issue date Jul 10, 2001
- Menicon Co., Ltd.
- Keiji Yamashita
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Jig for holding contact lens material, using light-scattering bondi...
- Patent number 5,901,948
- Issue date May 11, 1999
- Menicon Co., Ltd.
- Yasuyoshi Yamamoto
- B24 - GRINDING POLISHING
Information Patent Grant
Method and jig for holding contact lens material, using light-scatt...
- Patent number 5,630,901
- Issue date May 20, 1997
- Menicon Co., Ltd.
- Yasuyoshi Yamamoto
- B24 - GRINDING POLISHING