Average Co-Inventor Count = 3.00
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 Bell Laboratories (2 from 3,345 patents)
2 patents:
1. 5226073 - Telephone network credit card calling apparatus and method of telephone
2. 5163086 - Telephone network credit card calling apparatus and method of operation