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Tigard, OR, United States of America

Duane C Richards

Average Co-Inventor Count = 2.00

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 = 11

Duane C RichardsEdmund Jerome Stilwell (7 patents)Duane C RichardsEdmund Stilwell (2 patents)Duane C RichardsDuane C Richards (2 patents)Edmund Jerome StilwellEdmund Jerome Stilwell (7 patents)Edmund StilwellEdmund Stilwell (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Nmhg Oregon, LLC (2 from 27 patents)

2. Hyster - Yale Group, Inc. (92 patents)


2 patents:

1. 8893845 - Multi-stage brake pedal linkage

2. 8028788 - Spring applied brake and drive axle assembly

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12/30/2025
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