Growing community of inventors

Sheboygan, WI, United States of America

Robert Marquardt

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 = 18

Robert Marquardt ↔ Robert J Hess (1 patent)Robert MarquardtRobert Marquardt (1 patent)Robert J HessRobert J Hess (12 patents)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Redwood Sportswear Ltd. (1 from 1 patent)


1 patent:

1. 5797200 - Shoe with stretchable top

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as of
12/31/2025
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