Growing community of inventors

Owatonna, MN, United States of America

David R VonWald

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 = 7

David R VonWaldPerry L Virkler (1 patent)David R VonWaldDavid R VonWald (1 patent)Perry L VirklerPerry L Virkler (7 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Truth Hardware Corporation (1 from 146 patents)


1 patent:

1. 5452543 - Window operator track with integral limit stop

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as of
12/15/2025
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