Average Co-Inventor Count = 4.00
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. At&t Intellectual Property I, LP (4 from 16,510 patents)
2. Bellsouth Intellectual Property Corporation (2 from 987 patents)
3. At&t Delaware Intellectual Property Corporation, Inc. (2 from 178 patents)
8 patents:
1. 9219821 - Disposable telephone numbers
2. 8774384 - Disposable telephone numbers
3. 8509409 - Disposable telephone numbers
4. 8085921 - Disposable telephone numbers
5. 7469043 - Disposable telephone numbers
6. 7376139 - Inter-switch voicemail analysis tool
7. 6778657 - Analog dialed digit unlock method and system
8. 6778658 - Digital dialed digit unlock method and system