Average Co-Inventor Count = 9.00
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 3,557 patents)
2. Fine Sinter Co., Ltd (1 from 17 patents)
3. Nippon Steel Sumitomo Metal Corporation (1,101 patents)
1 patent:
1. 11534829 - Sintered friction material