Growing community of inventors

Wichita, KS, United States of America

William J Steffes

Average Co-Inventor Count = 1.14

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 = 305

William J SteffesRobert R Deines (1 patent)William J SteffesWilliam J Steffes (4 patents)Robert R DeinesRobert R Deines (10 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Coleman Outdoor Products, Inc. (3 from 11 patents)

2. The Coleman Company, Inc. (1 from 487 patents)


4 patents:

1. 5064088 - Picnic cooler with lid having integrally molded hinge

2. D309239 - Picnic cooler

3. 4889257 - Container with multiple position lid

4. 4515421 - Multiple use shelf for cooler

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as of
1/9/2026
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