Growing community of inventors

South Attleboro, MA, United States of America

Leonard Gray

Average Co-Inventor Count = 5.00

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 = 9

Leonard GrayRobert H Hudson (1 patent)Leonard GrayFrancis V Perry, Jr (1 patent)Leonard GrayWilliam P Richardson (1 patent)Leonard GrayRichard P Barlik (1 patent)Leonard GrayLeonard Gray (1 patent)Robert H HudsonRobert H Hudson (10 patents)Francis V Perry, JrFrancis V Perry, Jr (2 patents)William P RichardsonWilliam P Richardson (2 patents)Richard P BarlikRichard P Barlik (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Hasbro Development Corporation (1 from 12 patents)


1 patent:

1. 4129963 - Toy article having changeable expression graphics

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as of
12/16/2025
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