Average Co-Inventor Count = 2.00
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. Dowa Mining Co., Ltd. (1 from 217 patents)
2. Akita Zinc Co., Ltd. (1 from 3 patents)
1 patent:
1. 4148108 - Apparatus for polishing cathode plates for metal electrolytic refinery