Average Co-Inventor Count = 3.43
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. Mci Communications Corporation (1 from 473 patents)
2. Mci Worldcom, Inc. (1 from 72 patents)
2 patents:
1. 6763098 - Call blocking based on call properties
2. 6522734 - Transaction billing for special service telephone numbers