Growing community of inventors

Portland, ME, United States of America

David K Washburn

Average Co-Inventor Count = 3.00

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 = 37

David K Washburn ↔ Douglas E Norton (4 patents)David K Washburn ↔ Daniel J Richard (4 patents)David K WashburnDavid K Washburn (4 patents)Douglas E NortonDouglas E Norton (8 patents)Daniel J RichardDaniel J Richard (5 patents)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. 32north Corporation (4 from 8 patents)


4 patents:

1. D560890 - Footwear

2. D559516 - Footwear

3. D559515 - Footwear

4. D559514 - Footwear

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as of
12/20/2025
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