Average Co-Inventor Count = 7.20
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. National Oilwell Varco, L.p. (2 from 572 patents)
2 patents:
1. 9784041 - Drilling rig riser identification apparatus
2. 7946356 - Systems and methods for monitored drilling