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. Other (1 from 832,718 patents)
2. American Telephone and Telegraph, Co. (1 from 386 patents)
3. At&t Information Systems Inc. (1 from 243 patents)
2 patents:
1. 4899377 - Communication terminal telephone directory with dynamic directory tabbing
2. 4782521 - Communication terminal call reminder with automatic dialing