Growing community of inventors

Ipswich, United Kingdom

David J Clift

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 = 4

David J Clift ↔ David J Borthwick (1 patent)David J Clift ↔ Robert M Claxton (1 patent)David J Clift ↔ John G Johnston (1 patent)David J CliftDavid J Clift (1 patent)David J BorthwickDavid J Borthwick (2 patents)Robert M ClaxtonRobert M Claxton (2 patents)John G JohnstonJohn G Johnston (1 patent)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. British Telecommunications Corporation (1 from 445 patents)


1 patent:

1. 7756258 - Communications system with direct access mailbox

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as of
12/31/2025
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