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Masaki Naritomi
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Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Graded-refractive-index optical plastic material and method for its...
Patent number
6,593,415
Issue date
Jul 15, 2003
Yasuhiro Koike
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Graded-refractive-index optical plastic material and method for its...
Patent number
6,590,036
Issue date
Jul 8, 2003
Yasuhiro Koike
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Graded-refractive-index optical plastic material of a fluoropolymer...
Patent number
6,271,312
Issue date
Aug 7, 2001
Yasuhiro Koike
Yasuhiro Koike
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Fluorine-containing polymer composition
Patent number
RE37022
Issue date
Jan 16, 2001
Asahi Glass Company Ltd.
Norihide Sugiyama
524 - Synthetic resins or natural rubbers
Information
Patent Grant
Graded-refractive-index optical plastic material and method for its...
Patent number
5,783,636
Issue date
Jul 21, 1998
Yasuhiro Koike
Yasuhiro Koike
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Graded-refractive-index optical plastic material and method for its...
Patent number
5,760,139
Issue date
Jun 2, 1998
Koike; Yasuhiro
Yasuhiro Koike
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Fluorine-containing polymer composition
Patent number
5,498,657
Issue date
Mar 12, 1996
Asahi Glass Company Ltd.
Norihide Sugiyama
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Patents Applications
last 30 patents
Information
Patent Application
PLASTIC OPTICAL FIBER
Publication number
20120315478
Publication date
Dec 13, 2012
Masaki Naritomi
G02 - OPTICS
Information
Patent Application
Graded-refractive-index optical plastic material and method for its...
Publication number
20030069360
Publication date
Apr 10, 2003
Yasuhiro KOIKE
Yasuhiro Koike
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Application
Plastic optical fiber and process for its production
Publication number
20030021577
Publication date
Jan 30, 2003
ASAHI GLASS COMPANY LIMITED
Norihide Sugiyama
G02 - OPTICS
Information
Patent Application
Graded-refractive-index optical plastic material and method for its...
Publication number
20010004656
Publication date
Jun 21, 2001
Yasuhiro Koike
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL