Growing community of inventors

Creston, IA, United States of America

Robert L Shaffer

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 = 26

Robert L ShafferJoseph E Wallace (1 patent)Robert L ShafferRobert L Shaffer (1 patent)Joseph E WallaceJoseph E Wallace (8 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Vanmark Corporation (1 from 8 patents)


1 patent:

1. 4706556 - Potato chip manufacturing machine

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