Average Co-Inventor Count = 2.00
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. Shell Oil Comapny (1 from 7,646 patents)
1 patent:
1. 5541517 - Method for drilling a borehole from one cased borehole to another cased