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. Sakura Color Products Corporation (1 from 176 patents)
1 patent:
1. 9683118 - Oil-based pigment ink composition and oil-based pigment ink writing tool