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For the Inventor, By the Inventor

Iwata, Japan

Yoshio Fujikawa

USPTO Granted Patents = 12

 

Average Co-Inventor Count = 2.3

ph-index = 5

Forward Citations = 81(Granted Patents)


Location History:

  • Morimachi, JP (1997)
  • Shizuoka, JP (2000 - 2003)
  • Iwata, JP (1991 - 2021)

Company Filing History:

goldMedal11 out of 2,464 
 
Ntn Corporation
 patents
silverMedal1 out of 832,843 
Other
 patents

Years Active: 1991-2021

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12 patents (USPTO):Explore Patents
1. 10947950 - Hydroelectric power generation apparatus (2021-03-16),
2. 10648449 - Hydroelectric power generation apparatus (2020-05-12),
3. 8052327 - Hydrostatic gas bearing, rotator and CT scanner (2011-11-08),
4. 7066652 - Externally pressurized gas bearing and spindle equipment using this (2006-06-27),
5. 6956367 - Bearing assembly equipped with rotation sensor to determine rotation and position of rotating element (2005-10-18),
6. 6848828 - Foil bearing and spindle device using the same (2005-02-01),
7. 6581857 - Externally pressurized gas bearing spindle (2003-06-24),
8. 6524004 - Externally pressurized gas bearing spindle assembly (2003-02-25),
9. 6439773 - Externally pressurized gas bearing spindle assembly (2002-08-27),
10. 6019515 - Externally pressurized gas bearing assembly (2000-02-01),
11. 5660480 - Externally pressurized bearing spindle (1997-08-26),
12. 5073037 - Spindle assembly (1991-12-17),
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