Average Co-Inventor Count = 9.26
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. Ihara Chemical Industry Co., Ltd. (2 from 211 patents)
2 patents:
1. 5358538 - Process for production of black coloring material and cosmetics
2. 5244469 - Process for preparation of black coloring materials and application