Average Co-Inventor Count = 8.00
ph-index = 4
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. Hitachi Plant Engineering Construction Co., Ltd. (4 from 56 patents)
4 patents:
1. 6033569 - Method of biologically removing nitrogen and system therefor
2. 5997736 - Method of biologically removing nitrogen and system therefor
3. 5876603 - Method of biologically removing nitrogen and system therefor
4. 5849180 - Method of biologically removing nitrogen and system therefor