Growing community of inventors

Thomasville, NC, United States of America

H Russell Hallman

Average Co-Inventor Count = 1.20

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 = 31

H Russell HallmanJohn Trentman (1 patent)H Russell HallmanH Russell Hallman (3 patents)John TrentmanJohn Trentman (1 patent)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Amatech Group Limited (2 from 18 patents)

2. Electronic Data Magnetics, Inc. (1 from 1 patent)


3 patents:

1. 11919286 - Transaction cards and system

2. D952952 - Face shield for use with eyewear frames

3. 9242436 - Transaction cards and system

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as of
12/20/2025
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