Average Co-Inventor Count = 2.43
ph-index = 3
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. Gas Research Institute (3 from 645 patents)
2. Northern Research & Engineering Corp. (1 from 31 patents)
4 patents:
1. D378754 - Nozzle ring
2. D376154 - Turbine inner casing
3. D368480 - Turbine wheel
4. 4744724 - Absorption dynamometer