Average Co-Inventor Count = 6.03
ph-index = 5
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. (3 from 4,208 patents)
2. At&t Bell Laboratories (1 from 3,345 patents)
3. American Telephone and Telegraph, Co. (1 from 386 patents)
5 patents:
1. 5912951 - Voice mail system with multi-retrieval mailboxes
2. 5432845 - Post answer telephone call redirection or rerouting
3. 5369695 - Method of redirecting a telephone call to an alternate destination
4. 5291551 - Home agent telecommunication technique
5. 5164983 - Telemarketing complex performance management system