Average Co-Inventor Count = 1.50
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. Idemitsu Kosan Company, Limited (2 from 2,271 patents)
2 patents:
1. 5792731 - Lubricant composition for continuous variable transmissions and method
2. 4677844 - Apparent viscosity measuring apparatus