Average Co-Inventor Count = 3.00
ph-index = 1
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. Tie/communications, Inc. (1 from 60 patents)
2. Nippon Tsu Shin Kogyo K.k. (1 from 8 patents)
1 patent:
1. 4081625 - Control circuitry for key telephone apparatus