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. Sanyo Chemical Industries, Ltd. (2 from 353 patents)
2 patents:
1. 5763374 - Lubricating oil compositions of reduced high-temperature high-shear
2. 5622924 - Viscosity index improver and lubricating oil