Growing community of inventors

Eau Claire, WI, United States of America

Charles F Caldwell

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 = 1

Charles F CaldwellSeth R Rooney (1 patent)Charles F CaldwellBrian Ruben (1 patent)Charles F CaldwellCharles F Caldwell (2 patents)Seth R RooneySeth R Rooney (12 patents)Brian RubenBrian Ruben (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. National Presto Industries, Inc. (1 from 185 patents)

2. Rusoh, Inc. (1 from 14 patents)


2 patents:

1. 12498141 - Tiltable radiant heater

2. D989406 - Fire extinguisher reload kit

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as of
12/18/2025
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