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Cream Ridge, NJ, United States of America

Sigma Corporation

USPTO Granted Patents = 26

Trademarks = 13

Forward Citations = 1,470

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27 inventors (with patents filed for the assignee):

Stuart J Box (3 out of 3 patents)

Yuji Nagao (3 out of 9 patents)

Takashi Hagiwara (3 out of 29 patents)

4. Charles J Longacre (2 out of 2 patents)

5. David F Toler (2 out of 2 patents)

6. Kaoru Kanda (2 out of 5 patents)

7. Kikuo Nakamura (2 out of 3 patents)

8. Kunihiko Kanda (2 out of 2 patents)

9. Eric Ireland (2 out of 2 patents)

10. Satheesh Manicka Seshaiyer Chandrasekaran (1 out of 1 patent)

11. Hirokazu Suzuki (1 out of 40 patents)

12. Tatsuhiko Fujioka (1 out of 1 patent)

13. Kuniyoshi Sato (1 out of 2 patents)

14. Takashi Komori (1 out of 14 patents)

15. Yoshihiro Kinoshita (1 out of 1 patent)

26 patents: Sort by Forward Citations

1. 12448185 - Plastic meter lid and frame assembly for an in-ground meter box (2025-10-21),

2. 12196935 - Imaging optical system (2025-01-14),

3. 11318515 - Large diameter pipe rounding tool and method of use (2022-05-03),

4. 10036497 - Joint restraint devices and methods of using same (2018-07-31),

5. 7266875 - Joint restraint assembly (2007-09-11),

6. 7185924 - Joint restraint assembly (2007-03-06),

7. 6012981 - Game machine for single player (2000-01-11),

8. 5713572 - Pusher game apparatus (1998-02-03),

9. 5618233 - Running body and racing game apparatus using the same (1997-04-08),

10. 5591081 - Card game amusement device (1997-01-07),

11. 5580055 - Amusement device and selectively enhanced display for the same (1996-12-03),

12. 5507490 - Game apparatus (1996-04-16),

13. 5423539 - Slot machine with payout modifying symbols (1995-06-13),

14. 5382021 - Horse racing game having rotating arm and tethered members (1995-01-17),

15. 5209479 - Clot machine (1993-05-11),

Sigma Corporation is a leading manufacturer of high-quality cameras, lenses, and photographic accessories. With a rich history spanning over 50 years, we are dedicated to providing innovative imaging solutions for professionals and hobbyists alike. Our products are renowned for their exceptional performance, durability, and cutting-edge technology. Visit our website to explore our range of cameras, lenses, and accessories, and discover the perfect tools to unleash your creative vision.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 2 2025

26 Patents

#1 in Cream Ridge, NJ

#497 in New Jersey

#12,421 in US

#24,040 in the World

Cream Ridge, NJ, United States of America

Sigma Corporation

Forward Citations = 1,470

27 inventors:

Stuart J Box (3 out of 3 patents)

Yuji Nagao (3 out of 9 patents)

Takashi Hagiwara (3 out of 29 patents)

4. Charles J Longacre (2 out of 2 patents)

5. David F Toler (2 out of 2 patents)

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