Average Co-Inventor Count = 4.00
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. Waseda University (1 from 158 patents)
2. Jp Steel Plantech Co. (1 from 18 patents)
3. Kanagawa Institute of Industrial Science and Technology (1 from 16 patents)
1 patent:
1. 12345686 - Fracture toughness testing machine and fracture toughness test method