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. Nkk Corporation (2 from 614 patents)
2 patents:
1. 5092930 - Method for making insoluble heavy metals contained in fly ash discharged
2. 5092931 - Method for making insoluble heavy metals contained in fly ash discharged