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For the Inventor, By the Inventor

Boulder, CO, United States of America

Thomas Engine Company, LLC

Calculating rank
USPTO Granted Patents = 15

% Expired Patents = 100.0


Forward Citations = 78

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7 inventors (with patents filed for the assignee):

goldMedal Randall R Gaiser (5 out of 20 patents)

silverMedal Charles Russell Thomas (4 out of 11 patents)

bronzeMedal Bret R Hauser (4 out of 12 patents)

4.  Anton Polt (3 out of 3 patents)

5.  David Pratt Branyon (2 out of 18 patents)

6.  Michael Hold (1 out of 1 patent)

7.  Randall R Geiser (1 out of 1 patent)

8.  Anton Plot (0 patent)


15 patents:

1. 8534241 - CAM plate bearings for barrel engine (2013-09-17),
2. 8522732 - Flywheel for barrel engine (2013-09-03),
3. 8079336 - Compact valve actuation mechanism for barrel internal combustion engines (2011-12-20),
4. 8056542 - Intake system for a barrel internal combustion engine (2011-11-15),
5. 8015956 - Piston assembly for barrel engine (2011-09-13),
6. 7673607 - Tappet carrier for barrel engine (2010-03-09),
7. 7654234 - Barrel engine block assembly (2010-02-02),
8. 7600493 - Spline drive and cam shafts for barrel engines (2009-10-13),
9. 7581518 - Coaxial oil pump for barrel engines (2009-09-01),
10. 7469662 - Homogeneous charge compression ignition engine with combustion phasing (2008-12-30),
11. 7464673 - Single-ended barrel engine with double-ended, double roller pistons (2008-12-16),
12. 6899065 - Radial-valve gear apparatus for barrel engine (2005-05-31),
13. 6834636 - Single-ended barrel engine with double-ended, double roller pistons (2004-12-28),
14. 6698394 - Homogenous charge compression ignition and barrel engines (2004-03-02),
15. 6662775 - Integral air compressor for boost air in barrel engine (2003-12-16),
Company Overview
Thomas Engine Company, LLC, based in Boulder, Colorado, specializes in the development and manufacturing of advanced engine technologies. The company focuses on creating innovative solutions for various applications, including aerospace and automotive sectors. With a commitment to enhancing performance and efficiency, Thomas Engine leverages cutting-edge research in propulsion systems and energy conversion. Their expertise positions them as a key player in the evolving landscape of engine technology, catering to both commercial and industrial needs.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

15 Patents

#85 in Boulder, CO

#433 in Colorado

#21,085 in US

#39,991 in the World

Boulder, CO (US)
Boulder, CO, United States of America

Thomas Engine Company, LLC

Forward Citations = 78

7 inventors:

goldMedal Randall R Gaiser (5 out of 20 patents)

silverMedal Charles Russell Thomas (4 out of 11 patents)

bronzeMedal Bret R Hauser (4 out of 12 patents)

4.  Anton Polt (3 out of 3 patents)

5.  David Pratt Branyon (2 out of 18 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Thomas Engine Company, LLC. Retrieved from https://idiyas.com/company/thomas-engine-company

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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