Average Co-Inventor Count = 4.00
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. National Oilwell Varco Norway as (1 from 50 patents)
2. National Oilwell Vargo Norway as (1 from 1 patent)
2 patents:
1. 11885204 - Drilling rig
2. 10961825 - Drilling rig