Average Co-Inventor Count = 2.00
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. Hitachi, Ltd. (2 from 42,488 patents)
2 patents:
1. 6616121 - Control system for servo valve and control method therefor, and combined-cycle electric-power generating plant and gas turbine plant
2. 6508054 - Control system for servo valve and combined-cycle electric-power generating plant and gas turbine plant