Average Co-Inventor Count = 3.00
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. Nhk Spring Co., Ltd. (1 from 1,232 patents)
1 patent:
1. 4156675 - Urea polymer containing a sulfonate radical and method of preparing the