Average Co-Inventor Count = 7.00
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. Vallourec & Mannesmann Oil & Gas France (2 from 62 patents)
2. Nippon Steel Corporation (1 from 3,581 patents)
3. Nippon Steel Sumitomo Metal Corporation (1 from 1,102 patents)
4. Vallourec Oil and Gas France (163 patents)
2 patents:
1. 10626345 - Threaded joint for pipes
2. 9321982 - Threaded joint for pipes