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. Cummins Engine Company, Inc. (2 from 649 patents)
2 patents:
1. 4686348 - Method for hardfacing valves
2. 4529169 - Hardfaced valves and method of making same