Growing community of inventors

Knoxville, IA, United States of America

Mark VanHouwelingen

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 = 31

Mark VanHouwelingenRandy Ray Runquist (1 patent)Mark VanHouwelingenJames Richard Rankin (1 patent)Mark VanHouwelingenMark VanHouwelingen (1 patent)Randy Ray RunquistRandy Ray Runquist (27 patents)James Richard RankinJames Richard Rankin (11 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Vermeer Manufacturing Company, Inc. (1 from 470 patents)


1 patent:

1. 5778991 - Directional boring

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1/13/2026
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