Average Co-Inventor Count = 5.39
ph-index = 3
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 (3 from 3,554 patents)
2. Hitachi Zosen Corporation (1 from 278 patents)
3. Nippin Steel Corporation (1 from 1 patent)
4 patents:
1. 7399371 - Treatment method for improving fatigue life and long-life metal material treated by using same treatment
2. 6428633 - Steel for welded structures and welding wire
3. 5718776 - Steel plate less susceptible to welding distortion and highly bendable
4. 5550347 - Method of reducing welding distortion in one side welding for joining