Average Co-Inventor Count = 4.80
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. (2 from 42,488 patents)
2 patents:
1. 5694858 - Railway vehicle with micro pressure wave reducing contour for tunnel
2. 5188039 - Method of fixing inside panel of car and structure for fixing the same