Growing community of inventors

Crigglestone, United Kingdom

David Matthewman

Average Co-Inventor Count = 2.00

ph-index = 2

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 = 25

David MatthewmanBrian F Machin (3 patents)David MatthewmanDavid Matthewman (3 patents)Brian F MachinBrian F Machin (9 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Dunlop Limited a British Company (3 from 30 patents)


3 patents:

1. D329675 - Golf ball

2. D328321 - Golf ball

3. D319483 - Golf ball

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1/10/2026
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