Growing community of inventors

Vancouver, WA, United States of America

David A Hampel

Average Co-Inventor Count = 3.27

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 = 177

David A Hampel ↔ William R Barber, Jr (3 patents)David A Hampel ↔ Frederick C Hahn (1 patent)David A Hampel ↔ Ronald R Miller (1 patent)David A Hampel ↔ James E Ault (1 patent)David A Hampel ↔ Frecerick C Hahn (1 patent)David A HampelDavid A Hampel (3 patents)William R Barber, JrWilliam R Barber, Jr (5 patents)Frederick C HahnFrederick C Hahn (15 patents)Ronald R MillerRonald R Miller (1 patent)James E AultJames E Ault (1 patent)Frecerick C HahnFrecerick C Hahn (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Esco Corp. (3 from 177 patents)


3 patents:

1. 4454205 - Method of drill bit manufacture and product

2. 4404760 - Excavating tooth

3. 4335532 - Excavating tooth

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idiyas.com
as of
12/21/2025
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