Average Co-Inventor Count = 3.43
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. Gm Global Technolgoy Operations, Inc. (2 from 31,002 patents)
2 patents:
1. 5237972 - Two-stage cycle engine and combustion chamber
2. 4955338 - Engine and high turbulence piston therefor