Growing community of inventors

Montrose, United Kingdom

David Coull

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 = 11

David Coull ↔ Richard Alvin Armell (1 patent)David CoullDavid Coull (1 patent)Richard Alvin ArmellRichard Alvin Armell (11 patents)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Eljay Well Services Limited (1 from 1 patent)


1 patent:

1. 4964460 - Shut-in tool

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1/13/2026
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