Average Co-Inventor Count = 12.00
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 3,576 patents)
2. Nippon Steel Welding Products and Engineering Co., Ltd. (1 from 18 patents)
1 patent:
1. 5192016 - Methods for manufacturing tubes filled with powdery and granular