Average Co-Inventor Count = 2.43
ph-index = 12
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 Corp. (8 from 4,208 patents)
2. AT&T Intellectual Property I, LP (3 from 16,492 patents)
3. At&t Bell Laboratories (2 from 3,345 patents)
4. American Telephone & Telegraph Co., At&t Bell Laboratories (2 from 745 patents)
5. Other (1 from 832,843 patents)
6. American Telephone and Telegraph, Co. (1 from 386 patents)
16 patents:
1. 8688128 - Method and system for providing toll-free telematic and mobile services applications
2. 8019686 - Method and system for allowing simultaneous usage of prepaid services
3. 7873151 - User-controlled personalized announcements for account-based services
4. 7627529 - Method and system for allowing simultaneous usage of prepaid services
5. 7254222 - Method and apparatus for implementing a pre-paid card service
6. 6430285 - Method and apparatus for an automated caller interaction system
7. 6385311 - Real-time usage-based spontaneous subscription service
8. 6310946 - Method for interrupting a telephone call after receiving a busy signal
9. 6169796 - Call rerouter method and apparatus
10. 6061436 - Telephone billing system
11. 6026151 - Network based determination of cost effective access
12. 5859900 - Universal call access with reverse billing
13. 5056134 - Audible logo for identifying a common carrier
14. 4930154 - Audible logo for identifying a common carrier
15. 4899375 - More efficient call handling for operator assistance calls