For the Inventor, By the Inventor

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El Cajon, CA, United States of America

Energy Systems, Inc.

USPTO Granted Patents = 15

Forward Citations = 345

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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 leading provider of energy solutions for commercial and industrial customers. With over 20 years of experience, we specialize in designing and implementing energy-efficient systems that help reduce costs and carbon footprint. Our services include energy audits, solar panel installation, LED lighting upgrades, and more. We are committed to helping our clients achieve sustainability and cost savings through innovative energy solutions.

This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 23 2025

15 Patents

#5 in El Cajon, CA

#4,869 in California

#20,399 in US

#38,696 in the World

El Cajon, CA, United States of America

Energy Systems, Inc.

Forward Citations = 345

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)

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