Average Co-Inventor Count = 2.00
ph-index = 6
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. (13 from 191 patents)
2. National Oilwell Varco, L.p. (572 patents)
13 patents:
1. 7320374 - Wellbore top drive systems
2. 7231969 - Wellbore top drive power systems and methods of use
3. 7228913 - Tubular clamp apparatus for top drives and methods of use
4. D543833 - Support link
5. 7222683 - Wellbore top drive systems
6. 7188686 - Top drive systems
7. D533196 - Guard for derrick apparatus
8. D532798 - Guard for derrick apparatus
9. D524833 - Access platform for a well top drive system
10. D524334 - Swivel body for a well top drive system
11. D523451 - Support link for wellbore apparatus
12. D523210 - Block becket for use in a wellbore derrick
13. D519136 - Swivel body for a top drive in a wellbore derrick