Growing community of inventors

Houston, TX, United States of America

Andrew J Martin

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 = 23

Andrew J MartinRussell Alan Johnston (1 patent)Andrew J MartinAndrew J Martin (1 patent)Russell Alan JohnstonRussell Alan Johnston (8 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Camco International, Inc. (1 from 226 patents)


1 patent:

1. 6079497 - Pressure equalizing safety valve for subterranean wells

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as of
1/5/2026
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