Average Co-Inventor Count = 6.00
ph-index = 2
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. Hitachi, Ltd. (2 from 42,485 patents)
2. Tohoku Electric Power Company, Inc. (2 from 63 patents)
2 patents:
1. 5620308 - Gas turbine, gas turbine blade used therefor and manufacturing method
2. 5489194 - Gas turbine, gas turbine blade used therefor and manufacturing method