Average Co-Inventor Count = 3.46
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. Bell Telephone Laboratories (3 from 2,714 patents)
3 patents:
1. D246584 - Telephone stand
2. 4004136 - Credit verification terminal with dual information sources
3. 3938090 - Terminal apparatus