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. Weatherford Technology Holdings, LLC (1 from 895 patents)
2. Vetco Gray Inc. (1 from 452 patents)
2 patents:
1. 10012044 - Annular isolation device for managed pressure drilling
2. 8388255 - Dog-type lockout and position indicator assembly