Growing community of inventors

Starkville, MS, United States of America

David P Liffrig

Average Co-Inventor Count = 3.00

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 = 1

David P LiffrigDavid Vaughn (2 patents)David P LiffrigErnie B Mills (2 patents)David P LiffrigDavid P Liffrig (2 patents)David VaughnDavid Vaughn (10 patents)Ernie B MillsErnie B Mills (2 patents)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. The North American Coal Corporation (2 from 2 patents)


2 patents:

1. 11541800 - Rotatable tailgate

2. 10836295 - Rotatable tailgate

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as of
1/19/2026
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