Average Co-Inventor Count = 4.00
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. Denki Kagaku Kogyo Kabushiki Kaisha (1 from 475 patents)
1 patent:
1. 4190454 - Cement retarder and rapid hardening cement containing the same