Growing community of inventors

Vancouver, WA, United States of America

Richard R Estep

Average Co-Inventor Count = 2.86

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 = 13

Richard R EstepBrian D Campbell (1 patent)Richard R EstepThomas E Dixon (1 patent)Richard R EstepMark Schindlbeck (1 patent)Richard R EstepJames E Brosh (1 patent)Richard R EstepLarry D Marshal (1 patent)Richard R EstepRichard R Estep (2 patents)Brian D CampbellBrian D Campbell (4 patents)Thomas E DixonThomas E Dixon (2 patents)Mark SchindlbeckMark Schindlbeck (1 patent)James E BroshJames E Brosh (1 patent)Larry D MarshalLarry D Marshal (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Cascade Corporation (2 from 136 patents)


2 patents:

1. 10377617 - Opposable clamp arms having replaceable lower portions

2. 6572082 - Railway boxcar door operating unit

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as of
12/20/2025
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