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. Mitsui Minings & Melting Co., Ltd. (1 from 817 patents)
2. Tokyo Institute of Technology (1 from 566 patents)
1 patent:
1. 11970396 - Negative thermal expansion material, composite material, and method for producing negative thermal expansion material