Growing community of inventors

Hampshire, United Kingdom

Roger Duffield

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 = 0

Roger Duffield ↔ Randall M German (1 patent)Roger Duffield ↔ Ronald G Iacocca (1 patent)Roger Duffield ↔ Teh Fu Yen (1 patent)Roger DuffieldRoger Duffield (1 patent)Randall M GermanRandall M German (15 patents)Ronald G IacoccaRonald G Iacocca (4 patents)Teh Fu YenTeh Fu Yen (1 patent)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Klinair Environmental Technologies (ireland) Limited (1 from 1 patent)


1 patent:

1. 6458279 - Fuel filter and production process

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as of
12/29/2025
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