Average Co-Inventor Count = 2.86
ph-index = 4
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. (4 from 4,208 patents)
4 patents:
1. 6681008 - Automated toll-free telecommunications information service and apparatus
2. 6404877 - Automated toll-free telecommunications information service and apparatus
3. 6195426 - Service providing customized information to queuing customers
4. 6157841 - Cellular phone network that provides location-based information