Average Co-Inventor Count = 1.33
ph-index = 2
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. Hydril USA Manufacturing LLC (2 from 67 patents)
2 patents:
1. 9019118 - Automated well control method and apparatus
2. 8555976 - Emergency disconnect sequence timer display and method