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For the Inventor, By the Inventor

Braintree, MA, United States of America

Sigma Instruments, Inc.

USPTO Granted Patents = 37

Forward Citations = 514

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21 inventors (with patents filed for the assignee):

goldMedal Thomas E Beling (9 out of 9 patents)

silverMedal Thomas Yeh (6 out of 10 patents)

bronzeMedal 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)


Core Competencies:
Faulted Current Indicator
Power Distribution Systems
Electric Motor
Synchronous Motor
Strain Gauge
Signal Reading System
Stepping Motor
Control System
Timing Control
Overload Protection
Lighting Controls
Analog Value Display

37 patents:

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),
Company Overview
Sigma Instruments, Inc. is a technology company based in Braintree, Massachusetts, specializing in advanced measurement and control solutions for manufacturing processes. The organization focuses on developing innovative tools that enhance precision and efficiency in various industrial applications. With a strong emphasis on research and development, Sigma Instruments aims to provide cutting-edge technologies that cater to the evolving needs of the manufacturing sector, ensuring high-quality production standards and operational excellence.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

37 Patents

#3 in Braintree, MA

#540 in Massachusetts

#9,270 in US

#18,299 in the World

Braintree, MA (US)
Braintree, MA, United States of America

Sigma Instruments, Inc.

Forward Citations = 514

21 inventors:

goldMedal Thomas E Beling (9 out of 9 patents)

silverMedal Thomas Yeh (6 out of 10 patents)

bronzeMedal 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)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sigma Instruments, Inc.. Retrieved from https://idiyas.com/company/sigma-instruments

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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