For the Inventor, By the Inventor

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Hamilton, NJ, United States of America

Princetel, Inc.

USPTO Granted Patents = 21

Trademarks = 2

Forward Citations = 89

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8 inventors (with patents filed for the assignee):

Boying Barry Zhang (21 out of 29 patents)

Hong Zhang (19 out of 22 patents)

Louis D Violante (9 out of 9 patents)

4. Joe Ritacco (6 out of 6 patents)

5. Jingrong Shen (4 out of 5 patents)

6. Hong Zhang (2 out of 2 patents)

7. Liangju Lu (1 out of 1 patent)

8. Zelei Guan (1 out of 1 patent)

21 patents: Sort by Forward Citations

1. 12092875 - Rotatable capsule for a fiber optic rotary joint (2024-09-17),

2. 11953126 - Fluid rotary joint assembly suitable for high rotational speed (2024-04-09),

3. 11309673 - Slip ring system for high speed applications (2022-04-19),

4. 11289865 - High frequency slip ring with through bore (2022-03-29),

5. 11143823 - Fiber optic slip ring with through bore (2021-10-12),

6. 10133006 - Soft contacting rotational interface system for transmitting RF and optical signals concurrently across thereof (2018-11-20),

7. 9927579 - De-rotating mechanism for off-axis fiber optic rotary joint (2018-03-27),

8. 9634449 - Soft contacting rotational interface for RF rotary joint (2017-04-25),

9. 9335485 - Using an optical expander/condenser to achieve a compact beam structure for a multi-channel optical rotary joint (2016-05-10),

10. 9263838 - Slip ring for high speed data transmission (2016-02-16),

11. 9102405 - Cable-tethered helicopter surveillance system (2015-08-11),

12. 9096302 - Hydrogen replenished lighter-than-air vehicle and method to replenish hydrogen (2015-08-04),

13. 8965151 - Low insertion loss, low back reflection fiber optic rotary joint with increased data throughput (2015-02-24),

14. 8944698 - Compact, tunable, submersible dry mate n-pin optical connector (2015-02-03),

15. 8693822 - Limited rotation fiber optic rotary joint (2014-04-08),

Princetel, Inc. is a leading manufacturer and supplier of fiber optic rotary joints, slip rings, and optical transceivers for military, aerospace, and industrial applications. With a strong focus on innovation and advanced technologies, Princetel offers high-quality, reliable solutions for transmitting data and signals without any loss or interference. Their products are trusted by customers worldwide for their exceptional performance, durability, and versatility. Visit their website to learn more about their cutting-edge solutions and how Princetel can meet your specific requirements.

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

Company Badge

USPTO Data Jan 1 1976 - Jan 6 2026

21 Patents

#4 in Hamilton, NJ

#603 in New Jersey

#15,187 in US

#29,088 in the World

Hamilton, NJ, United States of America

Princetel, Inc.

Forward Citations = 89

8 inventors:

Boying Barry Zhang (21 out of 29 patents)

Hong Zhang (19 out of 22 patents)

Louis D Violante (9 out of 9 patents)

4. Joe Ritacco (6 out of 6 patents)

5. Jingrong Shen (4 out of 5 patents)

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