Growing community of inventors

Colchester, CT, United States of America

John Koopman

Average Co-Inventor Count = 7.76

ph-index = 1

The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.

Forward Citations = 3

John Koopman ↔ Andrzej E Stanek (2 patents)John Koopman ↔ Edward Demarest (2 patents)John Koopman ↔ Lawrence Clinton Moulthrop (1 patent)John Koopman ↔ Thomas M Skoczylas (1 patent)John Koopman ↔ Norman Schaefer (1 patent)John Koopman ↔ Frano Barbir (1 patent)John Koopman ↔ John Zagaja (1 patent)John Koopman ↔ Iris Liane Shiroma (1 patent)John Koopman ↔ Justin D Baltrucki (1 patent)John Koopman ↔ Elena Stockton (1 patent)John Koopman ↔ Jeffrey Stull (1 patent)John Koopman ↔ Daniel Rabbett (1 patent)John Koopman ↔ Allan Tomasco (1 patent)John KoopmanJohn Koopman (2 patents)Andrzej E StanekAndrzej E Stanek (4 patents)Edward DemarestEdward Demarest (2 patents)Lawrence Clinton MoulthropLawrence Clinton Moulthrop (8 patents)Thomas M SkoczylasThomas M Skoczylas (7 patents)Norman SchaeferNorman Schaefer (5 patents)Frano BarbirFrano Barbir (4 patents)John ZagajaJohn Zagaja (4 patents)Iris Liane ShiromaIris Liane Shiroma (4 patents)Justin D BaltruckiJustin D Baltrucki (4 patents)Elena StocktonElena Stockton (1 patent)Jeffrey StullJeffrey Stull (1 patent)Daniel RabbettDaniel Rabbett (1 patent)Allan TomascoAllan Tomasco (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Proton Energy Systems, Inc. (2 from 79 patents)


2 patents:

1. 7159444 - Combustible gas detection systems and method thereof

2. 7111493 - Combustible gas detection system

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as of
12/9/2025
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