Growing community of inventors

Princeton, NJ, United States of America

Richard D Hargrave

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 = 12

Richard D HargraveGeorge A Vaughn (1 patent)Richard D HargraveRichard D Hargrave (1 patent)George A VaughnGeorge A Vaughn (3 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Maark Corporation (1 from 2 patents)


1 patent:

1. 3935687 - Platform tennis court

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as of
12/19/2025
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