Average Co-Inventor Count = 2.93
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, L.p. (4 from 16,481 patents)
2. At+t Corp. (2 from 4,208 patents)
3. New York University (1 from 1,627 patents)
6 patents:
1. 11151576 - Authorizing transactions using negative pin messages
2. 10097543 - Networked device access control
3. 9363264 - Networked device access control
4. 8064581 - Method of associating multiple prepaid cards with a single account
5. 7310414 - Prepaid phone card service using speech recognition
6. 7280645 - Method of associating multiple prepaid cards with a single account