Growing community of inventors

San Ramon, CA, United States of America

Charles S Johnston

Average Co-Inventor Count = 4.00

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 = 281

Charles S Johnston ↔ William B Buchanan (1 patent)Charles S Johnston ↔ Roger J Van Duinen (1 patent)Charles S Johnston ↔ Dawn E Greiner (1 patent)Charles S JohnstonCharles S Johnston (1 patent)William B BuchananWilliam B Buchanan (1 patent)Roger J Van DuinenRoger J Van Duinen (1 patent)Dawn E GreinerDawn E Greiner (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Providian Financial Corporation (1 from 2 patents)


1 patent:

1. 5950179 - Method and system for issuing a secured credit card

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12/28/2025
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