Growing community of inventors

Carbondale, IL, United States of America

April A Johnson

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 = 41

April A Johnson ↔ John R Johnson (1 patent)April A JohnsonApril A Johnson (1 patent)John R JohnsonJohn R Johnson (21 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Other (1 from 832,961 patents)


1 patent:

1. 6821235 - Ankle exercise device

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1/14/2026
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