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. Societe Nationale Elf Aquitaine (production) (2 from 215 patents)
2 patents:
1. 5289354 - Method for acoustic transmission of drilling data from a well
2. 5245871 - Process for controlling a drilling operation