Growing community of inventors

Waterford, MI, United States of America

David L Johnstone

Average Co-Inventor Count = 1.00

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 = 11

David L JohnstoneDavid L Johnstone (1 patent)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Tom Mcguane Industries, Inc. (1 from 24 patents)


1 patent:

1. 4627463 - Fuel pressure regulator

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12/17/2025
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