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For the Inventor, By the Inventor

Columbus, OH, United States of America

Bellofram Corporation

Calculating rank
USPTO Granted Patents = 15

Trademarks = 13

Forward Citations = 203

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8 inventors (with patents filed for the assignee):

goldMedal Wilfred H St Laurent, Jr (8 out of 8 patents)

silverMedal Christos Athanassiu (4 out of 6 patents)

bronzeMedal Richard A Benson (2 out of 6 patents)

4.  Chuang Ji (2 out of 2 patents)

5.  Donald W Comstock (1 out of 1 patent)

6.  Peter B Marchetti (1 out of 1 patent)

7.  Wilfred St Laurent (1 out of 1 patent)

8.  Daniel E Smith (1 out of 1 patent)


15 patents:

1. 12504090 - Slam shut thermally triggered valve (2025-12-23),
2. 11988299 - Slam shut thermally triggered valve (2024-05-21),
3. 4905720 - Current-to-pressure transducer with enhanced performance features (1990-03-06),
4. 4729398 - Current-to-pressure transducers (1988-03-08),
5. 4705458 - Fluid operated pump (1987-11-10),
6. 4674526 - Switching valve (1987-06-23),
7. 4466455 - Rolling diaphragm vacuum control with check valve (1984-08-21),
8. 4390036 - Rolling diaphragm vacuum control (1983-06-28),
9. 4263838 - Pneumatic positioner (1981-04-28),
10. 4253675 - Improvements of sealed shafts (1981-03-03),
11. 4244589 - Sealed shaft of reduced diameter (1981-01-13),
12. 4229010 - Self-aligning shaft seal (1980-10-21),
13. 4219042 - Pneumatic relay (1980-08-26),
14. 4208060 - Sealed shaft (1980-06-17),
15. 3969991 - Rolling diaphragm and rolling diaphragm devices (1976-07-20),
Company Overview
Bellofram Corporation, headquartered in Columbus, Ohio, specializes in the design and manufacture of precision measurement and control instruments. The company focuses on providing innovative solutions in pressure, temperature, and level measurement, catering to a wide range of industries including aerospace, automotive, and industrial applications. With a commitment to quality and technological advancement, Bellofram continues to enhance its product offerings to meet the evolving needs of its global clientele.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

15 Patents

#50 in Columbus, OH

#884 in Ohio

#21,085 in US

#39,991 in the World

Columbus, OH (US)
Columbus, OH, United States of America

Bellofram Corporation

Forward Citations = 203

8 inventors:

goldMedal Wilfred H St Laurent, Jr (8 out of 8 patents)

silverMedal Christos Athanassiu (4 out of 6 patents)

bronzeMedal Richard A Benson (2 out of 6 patents)

4.  Chuang Ji (2 out of 2 patents)

5.  Donald W Comstock (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Bellofram Corporation. Retrieved from https://idiyas.com/company/bellofram

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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