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TOSHIO DANZUKA
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YOKOHAMA-SHI, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Optical fiber and method of manufacturing the same
Patent number
6,535,679
Issue date
Mar 18, 2003
Sumitomo Electric Industries, Ltd.
Yoshio Yokoyama
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Process for producing optical fiber preform
Patent number
6,324,871
Issue date
Dec 4, 2001
Sumitomo Electric Industries, Ltd.
Motonori Nakamura
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Silica glass article and manufacturing process therefor
Patent number
5,983,673
Issue date
Nov 16, 1999
Sumitomo Electric Industries, Ltd.
Akira Urano
G02 - OPTICS
Information
Patent Grant
Method for drawing glass preform for optical fiber
Patent number
5,788,734
Issue date
Aug 4, 1998
Sumitomo Electric Industries, Ltd.
Sumio Hoshino
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Method for elongating glass preform
Patent number
5,755,849
Issue date
May 26, 1998
Sumitomo Electric Industries, Ltd.
Sumio Hoshino
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Process for production of glass preform for optical fiber including...
Patent number
5,693,115
Issue date
Dec 2, 1997
Sumitomo Electric Industries, Ltd.
Masumi Ito
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Method for flame abrasion of glass preform
Patent number
5,685,889
Issue date
Nov 11, 1997
Sumitomo Electric Industries, Ltd.
Yuichi Ohga
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Method of manufacturing single-mode optical fiber
Patent number
5,676,725
Issue date
Oct 14, 1997
Sumitomo Electric Industries Ltd.
Masumi Ito
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Method and apparatus for drawing glass preform for optical fiber
Patent number
5,674,306
Issue date
Oct 7, 1997
Sumitomo Electric Industries, Ltd.
Sumio Hoshino
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Optical fiber preform manufacturing apparatus which measures a vert...
Patent number
5,624,474
Issue date
Apr 29, 1997
Sumitomo Electric Industries, Ltd.
Ichiro Tsuchiya
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Apparatus and method of manufacturing fiber
Patent number
5,585,137
Issue date
Dec 17, 1996
Sumitomo Electric Industries, Ltd.
Motonori Nakamura
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Apparatus for vitrifying soot preform for optical fiber
Patent number
5,513,983
Issue date
May 7, 1996
Sumitomo Electric Industries, Inc.
Masumi Ito
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Process for consolidation of porous preform for optical fiber
Patent number
5,470,369
Issue date
Nov 28, 1995
Sumitomo Electric Industries, Ltd.
Ichiro Tsuchiya
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Apparatus for the production of hermetically coated optical fiber
Patent number
5,352,261
Issue date
Oct 4, 1994
Sumitomo Electric Industries, Ltd.
Haruhiko Aikawa
C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information
Patent Grant
Apparatus of manufacturing hermetic coating optical fiber
Patent number
5,338,328
Issue date
Aug 16, 1994
Sumitomo Electric Industries, Ltd.
Haruhiko Aikawa
C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information
Patent Grant
Method of flame abrasion of glass preform
Patent number
5,338,327
Issue date
Aug 16, 1994
Sumitomo Electric Industries, Ltd.
Yuichi Ohga
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Method for producing glass preform for optical fiber
Patent number
5,330,548
Issue date
Jul 19, 1994
Sumitomo Electric Industries, Ltd.
Toshio Danzuka
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Method of manufacturing hermetic coating optical fiber
Patent number
5,296,011
Issue date
Mar 22, 1994
Sumitomo Electric Industries, Ltd.
Haruhiko Aikawa
C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information
Patent Grant
Method for producing glass soot deposit
Patent number
5,250,097
Issue date
Oct 5, 1993
Sumitomo Electric Industries Ltd.
Tatsuhiko Saitoh
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Method for producing porous glass preform for optical fiber
Patent number
5,238,479
Issue date
Aug 24, 1993
Sumitomo Electric Industries, Ltd.
Yuichi Ohga
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Method for producing glass preform for optical fiber
Patent number
5,236,482
Issue date
Aug 17, 1993
Sumitomo Electric Industries, Ltd.
Toshio Danzuka
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Method for producing glass article
Patent number
5,207,813
Issue date
May 4, 1993
Sumitomo Electric Industries, Ltd.
Toshio Danzuka
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Method for producing glass preform for optical fiber
Patent number
4,978,378
Issue date
Dec 18, 1990
Sumitomo Electric Industries, Ltd.
Masumi Ito
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Raw material supplying device and process
Patent number
4,938,789
Issue date
Jul 3, 1990
Sumitomo Electric Industries, Ltd.
Ichiro Tsuchiya
C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information
Patent Grant
Method for producing glass preform for optical fiber
Patent number
4,793,842
Issue date
Dec 27, 1988
Sumitomo Electric Industries, Ltd.
Hiroshi Yokota
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Method for producing glass preform for optical fiber
Patent number
4,781,740
Issue date
Nov 1, 1988
Sumimoto Electric Industries, Ltd.
Toshio Danzuka
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Method for producing glass preform for optical fiber
Patent number
4,765,815
Issue date
Aug 23, 1988
Sumitomo Electric Industries, Ltd.
Toshio Danzuka
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Method for producing glass preform for optical fiber
Patent number
4,668,263
Issue date
May 26, 1987
Sumitomo Electric Industries, Ltd.
Hiroshi Yokota
C03 - GLASS MINERAL OR SLAG WOOL
Patents Applications
last 30 patents
Information
Patent Application
Methods of making preform and optical fiber
Publication number
20020000104
Publication date
Jan 3, 2002
Sumitomo Electric Industries, Ltd.
Hideyuki Ijiri
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Application
OPTICAL FIBER AND METHOD OF MANUFACTURING THE SAME
Publication number
20010043782
Publication date
Nov 22, 2001
YOSHIO YOKOYAMA
C03 - GLASS MINERAL OR SLAG WOOL