Average Co-Inventor Count = 2.67
ph-index = 7
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. (17 from 42,485 patents)
2. Other (2 from 832,680 patents)
3. Hitachi Elevator Engineering Co., Ltd. (2 from 3 patents)
4. Hitachi Cable, Inc. (1 from 836 patents)
5. Hitachi Mito Engineering Co., Ltd. (1 from 7 patents)
6. Hitachi Mito Engineering (1 from 1 patent)
19 patents:
1. 6390270 - Escalator
2. 6247574 - Escalator installation method
3. 5526919 - Escalator apparatus and method of operation
4. 5386904 - Escalator apparatus and method of operation
5. 5348131 - Drive unit of conveyor
6. 5295568 - Passenger conveyor and treadboard construction for passenger conveyor
7. 5291982 - Passenger conveyor, platform floor for passenger conveyor, and comb for
8. D344384 - Escalator control box
9. 5178254 - Passenger conveyor
10. 5160009 - Passenger conveyor and moving handrail for passenger conveyor and
11. 5135097 - People mover apparatus
12. 5040659 - Indicating apparatus for passenger conveyor, indicating body used
13. 4984673 - Step of passenger conveyor method of manufacturing same, and wavy metal
14. 4871056 - Balustrade for passenger conveyer
15. 4819781 - Passenger conveyor with unitary balustrade panel support members