Growing community of inventors

Grafton, WI, United States of America

Robert C Clapper

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 = 5

Robert C ClapperRobert B Aiken (2 patents)Robert C ClapperRobert C Clapper (2 patents)Robert B AikenRobert B Aiken (12 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Milwaukee Sign Co., L.l.c. (2 from 8 patents)


2 patents:

1. 5896688 - Scrolling sign with manually operated change mechanism

2. 5598651 - Sign mechanism having traversable web

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as of
12/20/2025
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