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Sutton Coldfield, United Kingdom

David Roy Collins

Average Co-Inventor Count = 1.25

ph-index = 4

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 = 125

David Roy CollinsPaul Andrew Kelly (1 patent)David Roy CollinsAndrew Calloway (1 patent)David Roy CollinsDavid Roy Collins (5 patents)Paul Andrew KellyPaul Andrew Kelly (15 patents)Andrew CallowayAndrew Calloway (1 patent)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Trisport Limited (5 from 21 patents)


5 patents:

1. 6041526 - Ground-gripping elements for shoe soles

2. D395542 - Stud for footwear

3. D392451 - Stud for footwear

4. D363607 - Toothbrush with cap

5. 5452526 - Footwear having an outsole stiffener

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as of
12/13/2025
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