Average Co-Inventor Count = 7.00
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. Other (1 from 832,718 patents)
2. Nkk Corporation (1 from 614 patents)
3. Shinagawa Shirorenga K.k. (1 from 1 patent)
1 patent:
1. 5175134 - Ceramic tile produced from sludge slag