Average Co-Inventor Count = 6.00
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. Nippon Hoso' Kyokai (2 from 372 patents)
2. Nhk Integrated Technology Inc. (2 from 3 patents)
2 patents:
1. 5689804 - Medium-frequency radio transmission system
2. 5537637 - Medium-frequency radio broadcasting retransmission system for confined