Growing community of inventors

Godley, TX, United States of America

Joseph Welk

Average Co-Inventor Count = 2.00

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 = 0

Joseph WelkMike Xiaolei Lu (1 patent)Joseph WelkJoseph Welk (1 patent)Mike Xiaolei LuMike Xiaolei Lu (5 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. National Oilwell Varco, L.p. (1 from 572 patents)


1 patent:

1. 11738807 - Coiled tubing trailer

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as of
12/30/2025
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