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El Cajon, CA, United States of America

Energy Systems, Inc.

USPTO Granted Patents = 15

Forward Citations = 349

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16 inventors (with patents filed for the assignee):

William H Zebuhr (3 out of 41 patents)

Kenneth E Mayo (3 out of 4 patents)

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: Sort by Forward Citations

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),

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 based on public USPTO records.

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USPTO Data Jan 1 1976 - Oct 6 2026

15 Patents

#4 in El Cajon, CA

#5,022 in California

#21,034 in US

#39,881 in the World

El Cajon, CA, United States of America

Energy Systems, Inc.

Forward Citations = 349

16 inventors:

William H Zebuhr (3 out of 41 patents)

Kenneth E Mayo (3 out of 4 patents)

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)

Please report any incorrect information to [email protected]

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