Average Co-Inventor Count = 2.40
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. Continental Oil Company (2 from 304 patents)
2 patents:
1. 3968844 - Determining the extent of entry of fluids into a borehole during drilling
2. 3951824 - Dry drilling fluid composition