Growing community of inventors

Evansville, IN, United States of America

Dennis W Hollis

Average Co-Inventor Count = 1.33

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 = 18

Dennis W HollisHerbert E Collignon (1 patent)Dennis W HollisDennis W Hollis (2 patents)Herbert E CollignonHerbert E Collignon (4 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Babcock Industries Inc. (1 from 33 patents)

2. Fki Industries, Inc. (1 from 16 patents)


2 patents:

1. D421563 - Convertible hood for caster

2. 4793445 - Caster brake assembly

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as of
12/20/2025
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