Tadashi Umeda
21Patents
7h-index
29Co-inventors
69Inventor score
Filing activity: Jun 12, 1978 → Jun 26, 2003
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4936278A | Air-fuel ratio control method for internal combustion engines | Mechanical Engineering; Lighting; Heating | 22 | Expired |
| US4805579A | Method of controlling fuel supply during acceleration of an internal combustion engine | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US4382674A | Electrostatic copying apparatus | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4635606A | Fuel supply control system for internal combustion engines, capable of preventing vapor lock | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US4724464A | Area setting device | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4892076A | Fuel supply control system for internal combustion engines | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US4181424A | Method of and means for synchronously transferring original and copying paper for electrostatic photoduplication | Performing Operations; Transporting | 8 | Expired |
| US4515465A | Electrostatic copying apparatus | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4636057A | Electrostatic copying apparatus | Physics | 6 | Expired |
| US4520354A | Display device for copying apparatus | Physics | 5 | Expired |
| US4666283A | Electrostatic copying apparatus | Physics | 5 | Expired |
| US4702211A | Ignition timing control method for internal combustion engines | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4714338A | Electrostatic copying apparatus | Physics | 4 | Expired |
| US4478507A | Mount for rotary drum in an electrostatic copying apparatus | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4436411A | Toner dispenser and detector for an electrostatic copying apparatus | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4469431A | Electrostatic copying apparatus with sheet feeder | Emerging Cross-Sectional Technologies | 3 | Expired |
| US7119652B2 | Method of avoiding arc prolongation on current interruption, particulary a fuse | Electricity | 2 | Expired |
| US4666285A | Electrostatic copying apparatus | Physics | 2 | Expired |
| US6499460B2 | Ignition timing control device for internal combustion engine | Mechanical Engineering; Lighting; Heating | 1 | Expired |
| US4469432A | Electrostatic copying apparatus with cooling system | Emerging Cross-Sectional Technologies | 1 | Expired |
| US4197003A | Switch device in electrostatic photographic copying machine | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.