Growing community of inventors

Austin, TX, United States of America

Charles H Howard

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 = 43

Charles H HowardFranklin Dean Kalk (2 patents)Charles H HowardXiaoming Chen (2 patents)Charles H HowardPaul Chipman (2 patents)Charles H HowardKong Son (2 patents)Charles H HowardCharles H Howard (2 patents)Franklin Dean KalkFranklin Dean Kalk (11 patents)Xiaoming ChenXiaoming Chen (5 patents)Paul ChipmanPaul Chipman (2 patents)Kong SonKong Son (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Dupont Photomasks, Inc. (2 from 38 patents)


2 patents:

1. 6721695 - Method and apparatus for evaluating the runability of a photomask inspection tool

2. 6482557 - Method and apparatus for evaluating the runability of a photomask inspection tool

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as of
12/9/2025
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