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Hanamaki, Japan

Ricoh Optical Industries Co., Ltd.

USPTO Granted Patents = 11

EPO Patents = 2

Forward Citations = 49

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28 inventors (with patents filed for the assignee):

Kazuhiro Umeki (5 out of 12 patents)

Osamu Nagase (3 out of 7 patents)

Takashi Ikeda (2 out of 73 patents)

4. Hideaki Hirai (2 out of 54 patents)

5. Yoshitsugu Kohno (2 out of 5 patents)

6. Ryuhei Amano (2 out of 30 patents)

7. Shosen Sato (2 out of 2 patents)

8. Akira Takahashi (2 out of 37 patents)

9. Hiroaki Takahashi (1 out of 77 patents)

10. Toshihiro Kamei (1 out of 6 patents)

11. Kunihiko Araki (1 out of 7 patents)

12. Kenji Koyama (1 out of 21 patents)

13. Kazuhisa Takahashi (1 out of 1 patent)

14. Yoshitsugu Kono (1 out of 1 patent)

15. Shinichi Okuno (1 out of 4 patents)

11 patents: Sort by Forward Citations

1. 8641208 - Refractive optics and projection display apparatus (2014-02-04),

2. 8419191 - Projection optical system, projector and image reading device (2013-04-16),

3. 8178010 - Optical device and method of producing the same (2012-05-15),

4. 8087789 - Projection optical system and projection display device (2012-01-03),

5. 8008614 - Device for detecting emission light of micro-object having means for suppressing reflected and scattered excitation light (2011-08-30),

6. 7697395 - Optical device, method of producing the same, optical pickup, and optical information processing device (2010-04-13),

7. 7195732 - Method and mold for fabricating article having fine surface structure (2007-03-27),

8. 7050238 - Power combination optical system and light source module (2006-05-23),

9. 5830605 - Gradation mask method of producing the same and method of forming (1998-11-03),

10. 5776639 - Exposure mask, method of producing the same, exposure mask producing (1998-07-07),

11. 4720720 - Motor-driven film winder for cameras (1988-01-19),

Ricoh Optical Industries Co., Ltd. is a leading manufacturer of optical equipment and components. With a focus on precision and quality, the company produces a wide range of products including lenses, prisms, and optical filters for various industries such as medical, automotive, and industrial. Ricoh's innovative solutions and cutting-edge technology have made them a trusted partner in the optical industry.

This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 30 2025

11 Patents

#1 in Hanamaki

#4,040 in Japan

#50,224 in the World

Hanamaki, Japan

Ricoh Optical Industries Co., Ltd.

Forward Citations = 49

28 inventors:

Kazuhiro Umeki (5 out of 12 patents)

Osamu Nagase (3 out of 7 patents)

Takashi Ikeda (2 out of 73 patents)

4. Hideaki Hirai (2 out of 54 patents)

5. Yoshitsugu Kohno (2 out of 5 patents)

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