Growing community of inventors

Concord, NC, United States of America

Douglas H Angel

Average Co-Inventor Count = 3.00

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 = 8

Douglas H AngelEdwin X Graf (3 patents)Douglas H AngelDaniel J Foster (2 patents)Douglas H AngelWilliam Witte (1 patent)Douglas H AngelDouglas H Angel (3 patents)Edwin X GrafEdwin X Graf (50 patents)Daniel J FosterDaniel J Foster (2 patents)William WitteWilliam Witte (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Voith Sulzer Paper Technology North America, Inc. (3 from 71 patents)


3 patents:

1. 6623601 - Roll for paper-making machine

2. 6339883 - Method of making a roll for paper-making machine

3. 6299733 - Roll with composite material roll shell and head in a paper-making machine

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as of
12/16/2025
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