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 Sumitomo Metal Corporation (1 from 1,101 patents)
2. Vallourec & Mannesmann Oil & Gas France (1 from 62 patents)
1 patent:
1. 8557750 - Threaded joint for pipes