Growing community of inventors

Litchfield, IL, United States of America

Robert D Humphrey

Average Co-Inventor Count = 1.50

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 = 69

Robert D HumphreyDelby C Humphrey (2 patents)Robert D HumphreyRobert D Humphrey (3 patents)Delby C HumphreyDelby C Humphrey (3 patents)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Schutt Manufacturing Company, Inc. (2 from 12 patents)


3 patents:

1. 12065004 - Hitch mountable workout apparatus

2. D249397 - Face guard for mounting on an athletic helmet

3. 4086664 - Football face guard

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as of
1/14/2026
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