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For the Inventor, By the Inventor

Mito, Japan

Izumi Sankawa

USPTO Granted Patents = 6


Average Co-Inventor Count = 4.3

ph-index = 4

Forward Citations = 87(Granted Patents)


Location History:

  • Ibaraki, JP (1993)
  • Mito, JP (1995)
  • Setagaya, JP (1995)
  • Tokyo, JP (1995)
  • Kawasaki, JP (2007)

Company Filing History:

goldMedal6 out of 5,289 
 
Nippon Telegraph and Telephone Corporation
 patents
silverMedal4 out of 10,239 
 
Sumitomo Electric Industries, Limited
 patents
bronzeMedal1 out of 2,630 
 
The Furukawa Electric Co., Ltd.
 patents
where one patent can have more than one assignee

Years Active: 1993-2007

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6 patents (USPTO):Explore Patents
1. 7228040 - Hole-assisted single mode optical fiber (2007-06-05),
2. 5446810 - Optical switch, optical fiber arranging member and method of (1995-08-29),
3. 5430824 - Optical fibre, waveguide, and optical active device (1995-07-04),
4. 5422975 - Optical filter doped with rare earth elements and used with optical (1995-06-06),
5. 5396569 - Optical line monitoring method and an apparatus permitting simultaneous (1995-03-07),
6. 5214728 - Light communication system (1993-05-25),
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