Takehiro Toyooka

This inventor holds 31 USPTO granted patents. Top assignees: Nippon Oil Company, Ricoh Company, Ltd., Nippon Oil Corporation. Active years: 1991-2015.

USPTO Granted Patents = 31

% Patents Active = 83.9

Average Co-Inventor Count = 3.6

ph-index = 14

Forward Citations = 691(Granted Patents)

Location History:

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

Company Filing History:

Nippon Oil Corporation

patents

4. 2 out of 331

Jx Nippon Oil Energy Corporation

patents

5. 2 out of 590

Tokyo Institute of Technology

patents

6. 1 out of 1,010

Central Glass Company, Limited

patents

7. 1 out of 84

Nippon Mitsubishi Oil Corporation

patents

8. 1 out of 99

University of Yamanashi

patents

where one patent can have more than one assignee

Years Active: 1991-2015

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Areas of Expertise:

Liquid Crystalline Polymer

Battery Separator

Laser Oscillation Elements

Optical Diode

Circular Polarization Plate

Complex Diffraction Device

Viewing Angle Compensator

Nonlinear Optical Materials

Chiral Smectic C Polyester

Optical Rotator

Liquid Crystal Display

Heat-Resistant Optical Element

31 patents (USPTO):Sort by Forward CitationsExplore 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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