Growing community of inventors

London, United Kingdom

David H Powell

Average Co-Inventor Count = 1.87

ph-index = 6

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 = 183

David H PowellRichard W Seymour (3 patents)David H PowellVeronica G Steel (3 patents)David H PowellDavid E Maddison (3 patents)David H PowellRichard Seymour (2 patents)David H PowellDavid H Powell (7 patents)Richard W SeymourRichard W Seymour (9 patents)Veronica G SteelVeronica G Steel (6 patents)David E MaddisonDavid E Maddison (3 patents)Richard SeymourRichard Seymour (8 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Duracell Inc. (3 from 219 patents)

2. Minolta Company, Ltd. (2 from 2,816 patents)

3. Technophone Limited (2 from 26 patents)


7 patents:

1. D404050 - Camera

2. D398320 - Camera

3. D321183 - Portable handset telephone

4. D319061 - Charger stand for a portable handset telephone and its spare battery pack

5. D299173 - Flashlight

6. D296477 - Flashlight

7. D296478 - Flashlight

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as of
1/7/2026
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