Growing community of inventors

Escondido, CA, United States of America

Douglas N DeFoe

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 = 278

Douglas N DeFoeRichard G Trissel (1 patent)Douglas N DeFoeDouglas N DeFoe (1 patent)Richard G TrisselRichard G Trissel (7 patents)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Kaiser Electro-optics, Inc. (1 from 7 patents)


1 patent:

1. 5408346 - Optical collimating device employing cholesteric liquid crystal and a

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as of
12/9/2025
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