Growing community of inventors

Waterloo, CA, United States of America

Douglas Edgar Fregin

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 = 18

Douglas Edgar FreginTim O Cheung (1 patent)Douglas Edgar FreginDouglas Edgar Fregin (1 patent)Tim O CheungTim O Cheung (6 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Research in Motion Corporation (1 from 4,495 patents)


1 patent:

1. 7869180 - Spark gap apparatus and method for electrostatic discharge protection

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as of
12/14/2025
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