Growing community of inventors

Kalispell, MT, United States of America

John H Free

Average Co-Inventor Count = 3.00

ph-index = 3

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 = 33

John H Free ↔ David L Painter (3 patents)John H Free ↔ Leo A Groh (2 patents)John H Free ↔ Douglas D Ludwig (2 patents)John H FreeJohn H Free (3 patents)David L PainterDavid L Painter (28 patents)Leo A GrohLeo A Groh (2 patents)Douglas D LudwigDouglas D Ludwig (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Dart Industries Inc. (3 from 1,642 patents)


3 patents:

1. D261348 - Ribbed coffee urn lid

2. D261215 - Coffee urn lid

3. D255085 - Yogurt maker

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as of
1/15/2026
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