Average Co-Inventor Count = 9.03
ph-index = 4
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. Sbc Properties, L.p. (2 from 205 patents)
2. Sbc Technology Resources, Inc. (1 from 169 patents)
3. Ameritech Corporation (1 from 159 patents)
4. At&t Labs, Inc. (1 from 74 patents)
5 patents:
1. 7242754 - System and method for implementing and accessing call forwarding services
2. 7068761 - Method and system for canceling unwanted telephone calls
3. 6765994 - Method and system for canceling unwanted telephone calls
4. 6631186 - System and method for implementing and accessing call forwarding services
5. 6453019 - Method and system for canceling unwanted telephone calls