Growing community of inventors

Leesburg, IN, United States of America

Keith Coffman

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 = 26

Keith CoffmanRay E Swartzendruber (2 patents)Keith CoffmanKeith Coffman (2 patents)Ray E SwartzendruberRay E Swartzendruber (19 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Chore-Time Equipment, Inc. (2 from 30 patents)


2 patents:

1. D295905 - Base for a pig feeder

2. 4640229 - Apparatus for feeding livestock

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as of
1/20/2026
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