Average Co-Inventor Count = 2.67
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. Sumitomo Chemical Company, Limited (2 from 6,893 patents)
2 patents:
1. 3977827 - Process for dyeing acid-modified polyester fibers
2. 3942946 - Black dyeing of acid-modified polyester fiber