Growing community of inventors

Andover, MA, United States of America

David A Wassen

Average Co-Inventor Count = 5.00

ph-index = 2

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 = 747

David A WassenJian Zhang (2 patents)David A WassenChunghsin Lee (2 patents)David A WassenDarren M Simonelli (2 patents)David A WassenKeith D Mullins (1 patent)David A WassenKeith D Mullius (1 patent)David A WassenDavid A Wassen (2 patents)Jian ZhangJian Zhang (32 patents)Chunghsin LeeChunghsin Lee (26 patents)Darren M SimonelliDarren M Simonelli (5 patents)Keith D MullinsKeith D Mullins (1 patent)Keith D MulliusKeith D Mullius (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Semigear, Inc. (2 from 19 patents)


2 patents:

1. 7008879 - Isolation chamber arrangement for serial processing of semiconductor wafers for the electronic industry

2. 6827789 - Isolation chamber arrangement for serial processing of semiconductor wafers for the electronic industry

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as of
12/27/2025
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