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. Osaka Gas Company Limited (1 from 353 patents)
2. Ishikawajima-Harima Heavy Industries Co., Ltd. (1 from 341 patents)
3. Tokyo Gas Company Limited (1 from 193 patents)
4. Toho Gas Co., Ltd. (1 from 21 patents)
1 patent:
1. 5221586 - Power generation system using fuel cells