Average Co-Inventor Count = 4.00
ph-index = 2
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. Nec Home Electronics, Inc. (2 from 77 patents)
2. Nippon Hoso' Kyokai (1 from 372 patents)
2 patents:
1. 4947252 - Ghost canceling apparatus
2. 4897725 - Ghost canceling circuit