Growing community of inventors

Anaheim, CA, United States of America

Douglas W Unkrey

Average Co-Inventor Count = 4.00

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 = 33

Douglas W UnkreyJohn M Speicher (2 patents)Douglas W UnkreyAllan A Voigt (2 patents)Douglas W UnkreyFred D Fernandes (1 patent)Douglas W UnkreyFred D Fernandez (1 patent)Douglas W UnkreyDouglas W Unkrey (2 patents)John M SpeicherJohn M Speicher (13 patents)Allan A VoigtAllan A Voigt (7 patents)Fred D FernandesFred D Fernandes (1 patent)Fred D FernandezFred D Fernandez (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Versatron Research Corporation (2 from 2 patents)


2 patents:

1. D275381 - Human powered vehicle

2. 4410198 - Human powered vehicle

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as of
1/16/2026
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