Average Co-Inventor Count = 6.00
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. (1 from 42,517 patents)
2. Hitachi Information & Control Solutions, Ltd. (1 from 18 patents)
3. Hitachi Power Semiconductor Device, Ltd. (45 patents)
1 patent:
1. 7859210 - Semiconductor device for driving motor, three-phase motor and motor driving apparatus with the semiconductor device and fan motor