Average Co-Inventor Count = 6.63
ph-index = 8
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. (16 from 42,517 patents)
2. Hitachi Mito Engineering Co., Ltd. (4 from 7 patents)
16 patents:
1. 11560288 - Elevator operation management system and elevator operation management method
2. 7740111 - Elevator group supervisory control system with route preparation section
3. 7730999 - Elevator group supervisory control system using target route preparation
4. 7562746 - Method, system, and display for elevator allocation using multi-dimensional coordinates
5. 7426982 - Elevator group supervisory control system
6. 7097000 - Elevator apparatus
7. 6481531 - Elevator communications apparatus
8. 6408986 - Charger for elevator call devices
9. 5892190 - Method and system of controlling elevators and method and apparatus of
10. 5409085 - Group control elevator system for automatically adjusting elevator
11. 5307903 - Method and system of controlling elevators and method and apparatus of
12. 5283399 - Group control of elevator system improvement measures
13. 5258586 - Elevator control system with image pickups in hall waiting areas and
14. 5239141 - Group management control method and apparatus for an elevator system
15. 4989694 - Elevator group supervisory system