Average Co-Inventor Count = 3.00
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. Vallourec Drilling Products USA, Inc. (1 from 1 patent)
2. Vam Drilling USA, Inc. (1 from 1 patent)
2 patents:
1. 9222314 - Shale drill pipe
2. D726289 - Shale drill pipe