Growing community of inventors

Spring, TX, United States of America

Robert I Annas

Average Co-Inventor Count = 4.00

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 = 16

Robert I Annas ↔ Alan C Wright (1 patent)Robert I Annas ↔ Dennis H Hochsprung (1 patent)Robert I Annas ↔ Pat W Purcell (1 patent)Robert I AnnasRobert I Annas (1 patent)Alan C WrightAlan C Wright (7 patents)Dennis H HochsprungDennis H Hochsprung (1 patent)Pat W PurcellPat W Purcell (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Nl Industries (1 from 319 patents)


1 patent:

1. 4188624 - Method and apparatus for monitoring fluid flow through a drill string

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as of
12/20/2025
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