Growing community of inventors

San Jose, CA, United States of America

David J Johnson

Average Co-Inventor Count = 2.00

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 = 14

David J JohnsonCraig A Purdy (1 patent)David J JohnsonNate Shirley (1 patent)David J JohnsonLynn Rogers (1 patent)David J JohnsonCharles L Groghan (1 patent)David J JohnsonEron Flory (1 patent)David J JohnsonCharles L Croghan (1 patent)David J JohnsonDaryl W Bashor (1 patent)David J JohnsonRobert D Maneval (1 patent)David J JohnsonDavid J Johnson (5 patents)Craig A PurdyCraig A Purdy (31 patents)Nate ShirleyNate Shirley (14 patents)Lynn RogersLynn Rogers (2 patents)Charles L GroghanCharles L Groghan (1 patent)Eron FloryEron Flory (1 patent)Charles L CroghanCharles L Croghan (1 patent)Daryl W BashorDaryl W Bashor (1 patent)Robert D ManevalRobert D Maneval (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Other (3 from 832,912 patents)

2. Dfine, Inc. (1 from 92 patents)

3. U.S. Natural Resources, Inc. (1 from 66 patents)


5 patents:

1. 11172970 - High-pressure syringe with pressure reduction

2. 9053684 - Guitar neck adjustment

3. 5547133 - Manufacture process for ground oat cereal

4. 5368077 - Zero lead planer

5. 4987704 - Plunge jointer for planer knives

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as of
1/8/2026
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