Growing community of inventors

Waterville, OH, United States of America

John R Grube

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 = 8

John R GrubeRobert William Engel (1 patent)John R GrubeJohn R Grube (1 patent)Robert William EngelRobert William Engel (13 patents)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Other (1 from 832,891 patents)


1 patent:

1. 4343476 - Playing piece for a board game

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12/31/2025
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