Growing community of inventors

Grand Rapids, MI, United States of America

Mark S Drelles

Average Co-Inventor Count = 4.00

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 = 21

Mark S DrellesRobert Peter Arko (1 patent)Mark S DrellesEric T McClure (1 patent)Mark S DrellesKenneth J Penning (1 patent)Mark S DrellesMark S Drelles (1 patent)Robert Peter ArkoRobert Peter Arko (47 patents)Eric T McClureEric T McClure (9 patents)Kenneth J PenningKenneth J Penning (7 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Steelcase Inc. (1 from 1,812 patents)


1 patent:

1. 6053577 - Chair with adjustable armrest

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as of
1/13/2026
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