Growing community of inventors

Castro Valley, CA, United States of America

Keith B Robertson

Average Co-Inventor Count = 2.00

ph-index = 3

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 = 61

Keith B RobertsonChandrakant J Shah (5 patents)Keith B RobertsonKeith B Robertson (5 patents)Chandrakant J ShahChandrakant J Shah (10 patents)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Neopost Inc. (3 from 91 patents)

2. F.m.e. Corporation (2 from 30 patents)


5 patents:

1. 6938018 - Method and apparatus for a modular postage accounting system

2. 6356919 - Method and apparatus for redundant postage accounting data files

3. 6240403 - Method and apparatus for a modular postage accounting system

4. 5918234 - Method and apparatus for redundant postage accounting data files

5. 5822738 - Method and apparatus for a modular postage accounting system

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as of
12/18/2025
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