Average Co-Inventor Count = 5.33
ph-index = 2
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 (2 from 3,554 patents)
2. Hitachi Zosen Corporation (1 from 278 patents)
2 patents:
1. 5718776 - Steel plate less susceptible to welding distortion and highly bendable
2. 5550347 - Method of reducing welding distortion in one side welding for joining