Average Co-Inventor Count = 8.57
ph-index = 3
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 (3 from 3,345 patents)
3 patents:
1. 5333180 - Call message delivery system and method utilizing caller-selected system
2. 4972461 - Call message delivery system and method
3. 4939771 - Attendant-controlled call message delivery system and method