Average Co-Inventor Count = 3.00
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. Nippon Steel Corporation (1 from 3,563 patents)
2. Nippon Steel Bolten Co., Ltd. (1 from 3 patents)
1 patent:
1. 4189975 - Screwed connection having improved fatigue strength