Average Co-Inventor Count = 6.00
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. Ameritech Corporation (2 from 159 patents)
2. At&t Intellectual Property I, L.p. (1 from 16,478 patents)
3 patents:
1. 7903805 - Method and system for providing enhanced call waiting
2. 7095826 - Method and system for providing enhanced call waiting
3. 6539079 - Method and system for providing enhanced call waiting