Average Co-Inventor Count = 4.00
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. Shinko Electric Company, Ltd. (1 from 227 patents)
2. Japanese National Railways (1 from 50 patents)
1 patent:
1. 4696446 - System for detecting flat portion of peripheral surface of vehicle wheel