Average Co-Inventor Count = 8.00
ph-index = 1
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. China Oilfield Services, Limited (1 from 23 patents)
1 patent:
1. 11624244 - Connecting structure for drill collar of logging while drilling instrument and drill collar sub male and female joints