Growing community of inventors

Tempe, AZ, United States of America

John B Berkheimer

Average Co-Inventor Count = 3.00

ph-index = 2

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 = 47

John B BerkheimerR Terren Dunlap (2 patents)John B BerkheimerC Duane Woodmas (2 patents)John B BerkheimerJohn B Berkheimer (2 patents)R Terren DunlapR Terren Dunlap (4 patents)C Duane WoodmasC Duane Woodmas (3 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Go-video, Inc. (2 from 11 patents)


2 patents:

1. 5194963 - Dual deck videocassette recorder system

2. 5124807 - Dual deck videocassette recorder system

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as of
12/29/2025
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