Average Co-Inventor Count = 4.00
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. Mitsubishi Rayon Company, Limited (1 from 1,357 patents)
2. Itsubishi Rayon Co., Ltd. (1 from 1 patent)
2 patents:
1. 4919810 - Porous membrane
2. 4869857 - Process for producing porous membranes