Average Co-Inventor Count = 3.00
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. Columbia Gas System Service Corporation (1 from 29 patents)
1 patent:
1. 4805450 - Method of locating hydrocarbon producing strata and the instrument