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For the Inventor, By the Inventor

Yokohama, Japan

Takehiro Toyooka

USPTO Granted Patents = 31

Average Co-Inventor Count = 3.6

ph-index = 14

Forward Citations = 687(Granted Patents)


Location History:

  • Kanagawa, JP (1992 - 2004)
  • Yokohama, JP (1991 - 2010)
  • Tokyo, JP (2015)

Company Filing History:

goldMedal24 out of 690 
 
Nippon Oil Company
 patents
silverMedal6 out of 28,566 
 
Ricoh Company, Ltd.
 patents
bronzeMedal4 out of 188 
 
Nippon Oil Corporation
 patents
4. 2 out of 567 
 
Tokyo Institute of Technology
 patents
5. 2 out of 331 
 
Jx Nippon Oil Energy Corporation
 patents
6. 1 out of 84 
 
Nippon Mitsubishi Oil Corporation
 patents
7. 1 out of 1,001 
 
Central Glass Company, Limited
 patents
8. 1 out of 93 
 
University of Yamanashi
 patents
where one patent can have more than one assignee

Years Active: 1991-2015

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31 patents (USPTO):Explore Patents
1. 9139774 - Diacetylene derivative and liquid crystalline polymer having diacetylene structure (2015-09-22),
2. 9074308 - Battery separator comprising a polyolefin nanofilament porous sheet (2015-07-07),
3. 7826510 - Laser oscillation elements (2010-11-02),
4. 7701537 - Optical diode (2010-04-20),
5. 6977700 - Circular polarization plate and liquid crystal display device (2005-12-20),
6. 6750941 - Complex diffraction device (2004-06-15),
7. 6628369 - Circular polarizer and liquid crystal display (2003-09-30),
8. 6124913 - Compensating film for a liquid crystal display and an OCB mode liquid (2000-09-26),
9. 6034754 - Liquid crystal display device with compensating film(s) (2000-03-07),
10. 5943110 - Liquid crystal display device provided with a liquid crystalline (1999-08-24),
11. 5883685 - Compensating film for a liquid crystal display and an OCB mode liquid (1999-03-16),
12. 5855971 - Liquid crystalline optical film, compensating film for liquid crystal (1999-01-05),
13. 5526150 - Liquid crystal polymer viewing angle compensator for liquid crystal (1996-06-11),
14. 5510913 - Head-up display system where polarized light from a display impinges on (1996-04-23),
15. 5496498 - Compensator for liquid crystal display (1996-03-05),

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