Average Co-Inventor Count = 3.86
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. Nippon Hoso' Kyokai (2 from 374 patents)
2. Hitachi, Ltd. (1 from 42,508 patents)
3. Hitachi Denshi Kabushiki Kaisha (1 from 208 patents)
4. Shin-kobe Electric Machinery Co., Ltd. (1 from 102 patents)
5. Nippon Hoso Kyokai (the Japan Broadcasting Corporation) (1 from 1 patent)
3 patents:
1. 4800430 - Fundamental unit for processing video signals
2. 4673980 - Video-signal time-axis correction apparatus
3. 4377787 - System for measuring state of charge of storage battery