Average Co-Inventor Count = 3.16
ph-index = 5
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. (5 from 4,208 patents)
5 patents:
1. 5960348 - Technique for use in processing telephone calls
2. 5894504 - Advanced call waiting and messaging system
3. 5893903 - Multimedia message system with revenue allocation
4. 5724411 - Method for selectively alerting multiple telephones of an incoming call
5. 5706339 - Technique for use in processing personal telephone calls