Average Co-Inventor Count = 4.91
ph-index = 3
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. (2 from 4,208 patents)
2. Other (1 from 832,718 patents)
3 patents:
1. 5796812 - Method for transferring call-specific data between called parties
2. 5550909 - International toll-free calling process
3. 5432845 - Post answer telephone call redirection or rerouting