Average Co-Inventor Count = 13.00
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 National Petroleum Corporation (1 from 79 patents)
2. China National Logging Corporation (1 from 1 patent)
1 patent:
1. 11994410 - Calibration and verification system and method for directional sensor