Average Co-Inventor Count = 14.01
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. Hitachi, Ltd. (1 from 42,508 patents)
2. Central Japan Railway Company (1 from 118 patents)
3. A & F Corporation (1 from 2 patents)
1 patent:
1. D867208 - Rail vehicle