Growing community of inventors

Pullborough, United Kingdom

David E Maddison

Average Co-Inventor Count = 4.00

ph-index = 3

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 = 67

David E Maddison ↔ Richard W Seymour (3 patents)David E Maddison ↔ David H Powell (3 patents)David E Maddison ↔ Veronica G Steel (3 patents)David E MaddisonDavid E Maddison (3 patents)Richard W SeymourRichard W Seymour (9 patents)David H PowellDavid H Powell (7 patents)Veronica G SteelVeronica G Steel (6 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Duracell Inc. (3 from 219 patents)


3 patents:

1. D299173 - Flashlight

2. D296477 - Flashlight

3. D296478 - Flashlight

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as of
1/11/2026
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