Average Co-Inventor Count = 1.00
ph-index = 2
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 Mobility Ii LLC (2 from 2,866 patents)
2. At&t Wireless (1 from 5 patents)
3 patents:
1. 7945033 - Prepaid calling time processing: a method and apparatus for processing pre-paid calling time in a telephone communication system
2. 7447300 - Prepaid calling time processing: a method and apparatus for processing pre-paid calling time in a telephone communication system
3. 6707894 - Prepaid calling time processing: a method and apparatus for processing pre-paid calling time in a telephone communication system