Growing community of inventors

Hinckley, IL, United States of America

David Richard Freriks

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 Richard FreriksLeonard F Czuba (1 patent)David Richard FreriksDavid Richard Freriks (1 patent)Leonard F CzubaLeonard F Czuba (14 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Biokidz USA Nfp (1 from 1 patent)


1 patent:

1. 7152600 - Biohazard mask suitable for civilians

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as of
12/15/2025
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