Average Co-Inventor Count = 5.56
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 Bell Laboratories (3 from 3,345 patents)
2. American Telephone & Telegraph Co., At&t Bell Laboratories (2 from 745 patents)
3. American Telephone and Telegraph, Co. (1 from 386 patents)
5 patents:
1. 5185781 - Automation of telephone operator assistance calls
2. 5181237 - Automation of telephone operator assistance calls
3. 5163083 - Automation of telephone operator assistance calls
4. 4899375 - More efficient call handling for operator assistance calls
5. 4677609 - Semi-automated directory assistance systems