Growing community of inventors

Tulsa, OK, United States of America

Charles O'Brien

Average Co-Inventor Count = 3.00

ph-index = 2

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 = 188

Charles O'BrienStanley Jurga, Jr (2 patents)Charles O'BrienEric Niskanen (2 patents)Charles O'BrienCharles O'Brien (2 patents)Stanley Jurga, JrStanley Jurga, Jr (7 patents)Eric NiskanenEric Niskanen (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Ampac Enterprises Inc. (2 from 17 patents)


2 patents:

1. 5953761 - Protective headgear

2. D412376 - Protective headgear

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as of
12/24/2025
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