Average Co-Inventor Count = 3.33
ph-index = 4
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 and Telegraph, Co. (2 from 386 patents)
3. At&t Information Systems Inc. (2 from 243 patents)
5 patents:
1. D315343 - Facsimile transceiver
2. D313233 - Telephone answering set
3. D307560 - Housing for an infrared signal detector
4. D303638 - Alarm transmitter
5. D279288 - Housing for an automatic dialing telephone set or similar article