Average Co-Inventor Count = 4.00
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. Varco I/p, Inc. (2 from 191 patents)
2 patents:
1. 7303021 - Wellbore rig elevator systems
2. D533432 - Handle