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.
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