Growing community of inventors

Holland, MI, United States of America

Charles R Frigard

Average Co-Inventor Count = 2.40

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 = 59

Charles R Frigard ↔ Brennan J Olson (2 patents)Charles R Frigard ↔ Thomas J Brace (1 patent)Charles R FrigardCharles R Frigard (2 patents)Brennan J OlsonBrennan J Olson (10 patents)Thomas J BraceThomas J Brace (30 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Rollerblade, Inc. (2 from 71 patents)


2 patents:

1. D321393 - Slotted roller skate

2. D315941 - Roller skate brake

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idiyas.com
as of
12/12/2025
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