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Lihong Zhang
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Tokyo, JP
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last 30 patents
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Patent Grant
Preform and process for the production thereof
Patent number
6,231,243
Issue date
May 15, 2001
Hoya Corporation
Lihong Zhang
G02 - OPTICS
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Patent Grant
Manufacturing method for glass molded products
Patent number
6,105,395
Issue date
Aug 22, 2000
Hoya Corporation
Masahiro Yoshida
G02 - OPTICS
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Patent Grant
Method for manufacturing glass product
Patent number
6,050,110
Issue date
Apr 18, 2000
Hoya Corporation
Masahiro Yoshida
G02 - OPTICS