Average Co-Inventor Count = 3.00
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. Tohoku Electric Power Company, Inc. (1 from 63 patents)
3. Tohoku Pole Company, Inc. (1 from 1 patent)
1 patent:
1. 4759988 - Grain for construction material