Average Co-Inventor Count = 6.00
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 42,494 patents)
2. East Japan Railway Company (18 patents)
3. Hitachi Rail Limited (4 patents)
1 patent:
1. 12415406 - Air conditioner for rail vehicle