Growing community of inventors

Rolla, MO, United States of America

Douglas R Kralik

Average Co-Inventor Count = 1.33

ph-index = 4

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 = 156

Douglas R KralikHal D Mitchell (2 patents)Douglas R KralikDouglas R Kralik (4 patents)Hal D MitchellHal D Mitchell (26 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Figgie International, Inc. (3 from 147 patents)

2. A-T-O Inc. (1 from 98 patents)


4 patents:

1. 4869504 - Football and lacing for footballs

2. 4660831 - Inflatable padded game ball

3. 4423524 - Suspension system for headgear

4. 4407021 - Suspension system for headgear

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as of
1/8/2026
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