Average Co-Inventor Count = 3.00
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. Nippon Oil Company (2 from 690 patents)
2 patents:
1. 5401280 - Lead-free, high-octane gasoline
2. 5256167 - Gasoline