Average Co-Inventor Count = 2.12
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.
Company Filing History:
1. At+t Corp. (3 from 4,208 patents)
3 patents:
1. 6104786 - Telephony services suite
2. 5689552 - Telephone calling with automatic billing
3. 5463677 - Method and apparatus for facilitating the making of collect calls