Kiyoharu Hayakawa
30Patents
8h-index
43Co-inventors
75Inventor score
Filing activity: Aug 3, 1982 → Sep 26, 2011
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5639220A | Pump with inlet and outlet simultaneously exposed to pump chamber and method of operating same | Mechanical Engineering; Lighting; Heating | 49 | Expired |
| US4510036A | Limiting electric current type oxygen sensor with heater and limiting electric current type oxygen concentration detecting device using the same | Physics | 42 | Expired |
| US4500412A | Oxygen sensor with heater | Physics | 38 | Expired |
| US4574264A | Thin film oxygen sensor with microheater | Physics | 36 | Expired |
| US4595485A | Limiting electric current type oxygen sensor | Physics | 21 | Expired |
| US4864356A | Exposure device for image recording apparatus | Physics | 15 | Expired |
| US4661234A | Air-fuel ratio sensor and apparatus using the same | Physics | 12 | Expired |
| US4945374A | Pressure developing device | Physics | 8 | Expired |
| US4576705A | Apparatus with polarographic sensor to detect concentrations of plurality of gas components | Physics | 7 | Expired |
| US4905036A | Image forming process and system, including heating step or device for increased density of images | Physics | 6 | Expired |
| US4974937A | Color filter unit | Physics | 5 | Expired |
| US4894680A | Image recording apparatus | Physics | 5 | Expired |
| US4956649A | Image recording apparatus forming photomasking pattern on photosensitive medium | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4933685A | Image transfer system with preliminary-exposure device | Physics | 4 | Expired |
| US4901103A | Image recording apparatus using pressure sensitive sheet | Physics | 4 | Expired |
| US7712864B2 | Apparatus and method for maintaining recording head | Performing Operations; Transporting | 3 | Active |
| US4878083A | Pressure developing device in image recording apparatus | Physics | 2 | Expired |
| US4965592A | Image processing apparatus for reproducing images on projector screen and photosensitive medium | Physics | 2 | Expired |
| US8007071B2 | Image forming apparatus and information recording medium | Performing Operations; Transporting | 2 | Active |
| US4908653A | Exposure system for image recording apparatus | Physics | 2 | Expired |
| US9048107B2 | Semiconductor device | Electricity | 2 | Active |
| US4878084A | Method and device for feeding sheet in image recording apparatus | Physics | 2 | Expired |
| US4908652A | Image recording apparatus having upper and lower sections separable from each other at medium exposing path | Physics | 1 | Expired |
| US4958781A | Cassette for photo-sensistive recording medium | Physics | 1 | Expired |
| US5089838A | Pressure developing device | Physics | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.