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. Perkins Engines Company Limited (1 from 166 patents)
1 patent:
1. 7055510 - Internal combustion engine having an internal barrier device to reduce oil carry-over