Average Co-Inventor Count = 2.14
ph-index = 3
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. E.i. Dupont De Nemours and Company (2 from 16,338 patents)
2. Other (1 from 832,966 patents)
3 patents:
1. 4446024 - Hollow filament product
2. 4210093 - Counting device
3. 4105548 - Separation device of rigid porous inorganic hollow filament and use