Average Co-Inventor Count = 3.43
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. Sakura Color Products Corporation (2 from 176 patents)
2 patents:
1. 6171381 - Aqueous metallic ink composition
2. 5854320 - Water base erasable ink compositions