Average Co-Inventor Count = 1.60
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 Oil and Gas France (2 from 163 patents)
2. Nippon Steel Corporation (1 from 3,563 patents)
3. Petroleo Brasileiro S.a. - Petrobras (433 patents)
4. Vallourec Soluções Tubulares Do Brasil S.a. (2 patents)
2 patents:
1. 12054994 - Threaded connection for casing string of an oil well
2. 11274500 - Pressure test plug for improved tubular threaded component