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Superior, CO, United States of America

Theresa A Clark

Average Co-Inventor Count = 1.00

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 = 102

Theresa A ClarkTheresa A Clark (3 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. U S West, Inc. (1 from 125 patents)

2. Mediaone Group, Inc. (1 from 91 patents)

3. Qwest Communications Int'l., Inc. (1 from 16 patents)

4. Quest Communications Int'l., Inc. (1 from 2 patents)


3 patents:

1. 6370241 - Telephony system for calling card calls

2. 6296183 - Telephony system for smart card usage

3. 6081791 - Enhanced ATM for facilitating telephony access

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as of
12/6/2025
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