Average Co-Inventor Count = 2.00
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. Columbia Gas System Service Corporation (2 from 29 patents)
2 patents:
1. 4773255 - Apparatus for injecting gas into a pipeline
2. 4690689 - Gas tracer composition and method