Average Co-Inventor Count = 3.43
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. Hitachi, Ltd. (2 from 42,488 patents)
2 patents:
1. 4884126 - Semiconductor device having parallel-connected, self turn-off type
2. 4831288 - Direct parallel connection circuit of self-turn-off semiconductor