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. John M. Nelson (0 patent)
4. William L. Snider (0 patent)
5. David V. Person (0 patent)
6. 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