Average Co-Inventor Count = 1.67
ph-index = 1
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. Qwest Communications International Inc. (2 from 435 patents)
2 patents:
1. 7133508 - Prepaid long distance call system and method
2. 6931106 - System and method for using voice-messaging system to place local and long distance telephone calls