Average Co-Inventor Count = 3.26
ph-index = 8
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 (6 from 16,492 patents)
2. Sbc Technology Resources, Inc. (4 from 169 patents)
3. At&t Labs, Inc. (4 from 74 patents)
4. Sbc Properties, L.p. (1 from 205 patents)
5. Sbc Knowledge Ventures, L.p. (1 from 125 patents)
6. At&t Knowledge Ventures, LP (1 from 71 patents)
17 patents:
1. 8514847 - Methods and apparatus for maintaining connectivity with an internet protocol phone operating behind a firewall
2. 8102861 - Data and voice messaging system
3. 7995563 - Internet caller identification system and method
4. 7899873 - System and method of controlling a messaging system
5. 7664096 - Remote location VOIP roaming behind firewalls
6. 7565690 - Intrusion detection
7. 7461381 - Flexible network platform and call processing system
8. 7447739 - Data and voice messaging system
9. 7336653 - Internet caller identification system and method
10. 7242754 - System and method for implementing and accessing call forwarding services
11. 7212893 - Network car analyzer
12. 7103367 - Network-based services for misplaced cellular mobile stations
13. 6985587 - Method and system for calling line authenticated key distribution
14. 6920381 - Network car analyzer
15. 6816481 - Internet caller identification system and method