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 International, Inc. (1 from 49 patents)
2. Tuboscope Vetco International Inc. (1 from 16 patents)
3. Varco I/p, Inc. (191 patents)
4. John M. Nelson (0 patent)
5. William L. Snider (0 patent)
6. David V. Person (0 patent)
7. Gary W. Bogema (0 patent)
2 patents:
1. 6294042 - Method and apparatus for lining tubulars and lined tubular assembly
2. 5964981 - Apparatus for lining tubulars