For the Inventor, By the Inventor

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Cranberry, PA, United States of America

Sigma Instruments, Inc.

USPTO Granted Patents = 37

Trademarks = 2

Forward Citations = 512

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21 inventors (with patents filed for the assignee):

Thomas E Beling (9 out of 9 patents)

Thomas Yeh (6 out of 10 patents)

John G Gamble (5 out of 5 patents)

4. Joseph R Thibodeau (4 out of 4 patents)

5. John H Field (4 out of 4 patents)

6. Thomas I Marx (3 out of 4 patents)

7. John H Field, Ii (3 out of 3 patents)

8. John B Crunick (2 out of 2 patents)

9. Matthew G Dillon (2 out of 2 patents)

10. John O Morin (2 out of 2 patents)

11. Leopold Bric (2 out of 2 patents)

12. Joseph G Cremonese (1 out of 5 patents)

13. Ralph W Horber (1 out of 7 patents)

14. Tamas Becse (1 out of 1 patent)

15. Lou L Laskey, Jr (1 out of 1 patent)

37 patents: Sort by Forward Citations

1. D530019 - Personal massager (2006-10-10),

2. 6539328 - Device and process for measurement and treatment of spinal mobility (2003-03-25),

3. 5136456 - Faulted current indicator with protection against temporary overloads (1992-08-04),

4. 5124642 - Power line post insulator with dual inductor current sensor (1992-06-23),

5. 5111189 - Fault indicator with timing control (1992-05-05),

6. 5097202 - Faulted current indicators with improved signal to noise ratios (1992-03-17),

7. 5055771 - Faulted current indicators with improved signal to noise ratios (1991-10-08),

8. 5045778 - Fault indicator with inrush restraint (1991-09-03),

9. 5029039 - Current adaptive fault indicator (1991-07-02),

10. 5003426 - Faulted current indicators and inrush restraints therefor (1991-03-26),

11. 4984124 - Faulted current indicator with inrush restraint (1991-01-08),

12. 4980790 - Fault indicating means (1990-12-25),

13. 4968884 - Vertically sensitive outdoor lighting controls (1990-11-06),

14. 4864264 - Bistable toggling indicator (1989-09-05),

15. 4859925 - Power transmission systems and means for control thereof (1989-08-22),

Sigma Instruments, Inc. is a leading manufacturer and supplier of precision instruments for various industries. With a strong focus on quality and innovation, we provide a wide range of high-performance instruments including measurement tools, testing equipment, and industrial sensors. Our products are designed to meet the diverse needs of our customers and are backed by superior customer service and technical support. Visit our website to learn more about our advanced solutions and how we can help optimize your operations.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 2 2025

37 Patents

#2 in Cranberry, PA

#334 in Pennsylvania

#8,934 in US

#17,688 in the World

Cranberry, PA, United States of America

Sigma Instruments, Inc.

Forward Citations = 512

21 inventors:

Thomas E Beling (9 out of 9 patents)

Thomas Yeh (6 out of 10 patents)

John G Gamble (5 out of 5 patents)

4. Joseph R Thibodeau (4 out of 4 patents)

5. John H Field (4 out of 4 patents)

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