Growing community of inventors

Houston, TX, United States of America

David William Dartford

Average Co-Inventor Count = 3.00

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 = 12

David William Dartford ↔ George Tisdale (1 patent)David William Dartford ↔ Timothy Steven Williams (1 patent)David William DartfordDavid William Dartford (1 patent)George TisdaleGeorge Tisdale (3 patents)Timothy Steven WilliamsTimothy Steven Williams (1 patent)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. National Oilwell Varco, L.p. (1 from 572 patents)


1 patent:

1. 7766580 - Energy managing keel joint

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as of
12/14/2025
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