Keiji Ito
58Patents
21h-index
92Co-inventors
91Inventor score
Filing activity: Aug 3, 1983 → Feb 26, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5427087A | Structure of the distal end portion of an endoscope | Physics | 320 | Expired |
| US5685823A | End structure of endoscope | Human Necessities | 255 | Expired |
| US5725477A | Front end structure of endoscope | Human Necessities | 194 | Expired |
| US5725474A | Front end structure of endoscope | Human Necessities | 158 | Expired |
| US5725476A | Front end structure of endoscope | Human Necessities | 147 | Expired |
| US6142930A | Electronic endoscope having compact construction | Human Necessities | 131 | Expired |
| US4519820A | Fitter apparatus for purifying exhaust gases | Emerging Cross-Sectional Technologies | 91 | Expired |
| US5454366A | Endoscope distal end with folded circuit board | Electricity | 89 | Expired |
| US4971035A | Insert part of endoscope | Human Necessities | 84 | Expired |
| US5993381A | Operating unit for an endoscope | Human Necessities | 79 | Expired |
| US5411020A | Structure of the distal end portion of an endoscope | Human Necessities | 74 | Expired |
| US6117071A | Endoscope with movable imaging unit for zooming or focusing | Electricity | 72 | Expired |
| US5788628A | Endoscope | Human Necessities | 62 | Expired |
| US5746695A | Front end structure of endoscope | Human Necessities | 56 | Expired |
| US4632683A | Exhaust gas purifying filter and production of the same | Emerging Cross-Sectional Technologies | 52 | Expired |
| US6473704B1 | Information guidance system | Physics | 47 | Expired |
| US5725475A | Front end structure of endoscope | Human Necessities | 38 | Expired |
| US6826297B2 | Displaying three-dimensional medical images | Physics | 34 | Expired |
| US5305736A | Distal end part of endoscope | Human Necessities | 34 | Expired |
| US4972828A | Endoscope having adjustable forceps insertion inlet portion | Human Necessities | 26 | Expired |
| US7759283B2 | Catalyst for purifying exhaust gas | Emerging Cross-Sectional Technologies | 23 | Active |
| US6409666B1 | Tip end of ultrasonic endoscope | Human Necessities | 15 | Expired |
| US6242072A | Honeycomb structural body and process for production of the same | Emerging Cross-Sectional Technologies | 14 | Expired |
| US5554342A | Electrical heating type catalytic device | Emerging Cross-Sectional Technologies | 13 | Expired |
| US7564884B1 | Ridge-stripe semiconductor laser | Electricity | 9 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.