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For the Inventor, By the Inventor

El Cajon, CA, United States of America

Energy Systems, Inc.

Calculating rank
USPTO Granted Patents = 15

Forward Citations = 350

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16 inventors (with patents filed for the assignee):

goldMedal William H Zebuhr (3 out of 41 patents)

silverMedal Kenneth E Mayo (3 out of 4 patents)

bronzeMedal Robert C Hanson (3 out of 4 patents)

4.  Robert George Gallagher (2 out of 2 patents)

5.  Charles R Fink (2 out of 3 patents)

6.  Leon C Hanson (2 out of 3 patents)

7.  Eduardo Leon (1 out of 16 patents)

8.  G Wayne Westerman (1 out of 5 patents)

9.  Barry S Welton (1 out of 3 patents)

10.  Fumio Mizuno (1 out of 1 patent)

11.  Fumio Takeuchi (1 out of 1 patent)

12.  Shunsuke Kobayashi (1 out of 1 patent)

13.  Terrence R Caster (1 out of 1 patent)

14.  Laurance W Burry (1 out of 1 patent)

15.  James E Riley (1 out of 1 patent)


15 patents:

1. D575381 - Condenser shroud for DC cooler (2008-08-19),
2. 4556082 - Removable thermal insulation jacket for valves and fittings (1985-12-03),
3. 4294225 - Diver heater system (1981-10-13),
4. 4277254 - Control system and apparatus for producing compatible mixtures of fuel (1981-07-07),
5. 4203300 - Horizontal direct fired water bath propane vaporizer (1980-05-20),
6. 4172495 - Slurry cooling of helmets (1979-10-30),
7. 4167932 - Diver heater system (1979-09-18),
8. 4143448 - Method and apparatus for manufacturing solar heater panels (1979-03-13),
9. 4133055 - Protective helmet with thermal liner (1979-01-09),
10. 4131084 - Upright direct fired water bath propane vaporizer (1978-12-26),
11. 4039252 - Field-effect liquid crystal-type display device (1977-08-02),
12. 4011856 - Solar fluid heater (1977-03-15),
13. 4010704 - Buoyant sphere (1977-03-08),
14. 3972317 - Solar fluid heater (1976-08-03),
15. 3965736 - Clamp-on transducer for well unit (1976-06-29),
Company Overview
Energy Systems, Inc. is a technology-driven company based in El Cajon, California, specializing in advanced energy solutions. The organization focuses on the development and manufacturing of innovative systems that enhance energy efficiency and sustainability across various sectors. With a commitment to research and development, Energy Systems, Inc. aims to address the evolving needs of the energy landscape, providing cutting-edge products and services that contribute to a more sustainable future.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

15 Patents

#4 in El Cajon, CA

#5,037 in California

#21,085 in US

#39,991 in the World

El Cajon, CA (US)
El Cajon, CA, United States of America

Energy Systems, Inc.

Forward Citations = 350

16 inventors:

goldMedal William H Zebuhr (3 out of 41 patents)

silverMedal Kenneth E Mayo (3 out of 4 patents)

bronzeMedal Robert C Hanson (3 out of 4 patents)

4.  Robert George Gallagher (2 out of 2 patents)

5.  Charles R Fink (2 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Energy Systems, Inc.. Retrieved from https://idiyas.com/company/energy-systems

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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