Hideyo Ujihara
8Patents
3h-index
4Co-inventors
46Inventor score
Filing activity: Mar 5, 1987 → Jun 27, 2002
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4719993A | Control apparatus for elevator | Performing Operations; Transporting | 6 | Expired |
| US5074385A | Call registration apparatus in an elevator system | Performing Operations; Transporting | 6 | Expired |
| US4742894A | Apparatus for controlling elevator | Performing Operations; Transporting | 3 | Expired |
| US6427808B1 | Elevator information communication system | Performing Operations; Transporting | 3 | Expired |
| US6497306B2 | Elevator information communication system | Performing Operations; Transporting | 2 | Expired |
| US6488127B2 | Elevator information communication system | Performing Operations; Transporting | 1 | Expired |
| US6561319B2 | Elevator information communication system | Performing Operations; Transporting | 1 | Expired |
| US5390765A | Method of operating elevator | Performing Operations; Transporting | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.