Average Co-Inventor Count = 11.00
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. Japan Tobacco Inc. (1 from 1,040 patents)
2. Tohoku Electric Power Company, Inc. (1 from 66 patents)
3. Kett Electric Laboratory (1 from 12 patents)
1 patent:
1. 5873982 - Method and apparatus of discriminating coal species