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Toru Kuwahara
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Yokohama, JP
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last 30 patents
Information
Patent Grant
System for producing an optical fiber preform with gas volume control
Patent number
4,421,540
Issue date
Dec 20, 1983
Nippon Telegraph & Telephone Public Corporation
Motohiro Nakahara
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Process for producing optical fiber preform
Patent number
4,414,008
Issue date
Nov 8, 1983
Nippon Telegraph & Telephone Public Corporation
Takao Edahiro
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Process for producing high-purity silica glass
Patent number
4,406,680
Issue date
Sep 27, 1983
Nippon Telegraph & Telephone Public Corporation
Takao Edahiro
C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information
Patent Grant
Process for producing a glass preform for optical fiber
Patent number
4,338,111
Issue date
Jul 6, 1982
Nippon Telegraph & Telephone Public Corporation
Takao Edahiro
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Process for producing optical fiber preform
Patent number
4,318,726
Issue date
Mar 9, 1982
Nippon Telegraph and Telephone Public Corp.
Takao Edahiro
C03 - GLASS MINERAL OR SLAG WOOL