Masahiro Nakajima
92Patents
18h-index
114Co-inventors
87Inventor score
Filing activity: Jun 3, 1976 → Apr 18, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6431762B1 | Optical connector adapter | Physics | 226 | Expired |
| US6151432A | Universal optical fiber connectors and basic plugs thereof | Physics | 221 | Expired |
| US6224270A | Universal optical fiber connectors and basic plugs thereof | Physics | 116 | Expired |
| US7118284B2 | Optical connector plug, optical connector adapter and optical connector | Physics | 110 | Expired |
| US6533468B2 | Universal optical fiber connectors and basic plugs thereof | Physics | 72 | Expired |
| US6908233B2 | Optical connector plug, optical connector adapter and optical connector | Physics | 67 | Expired |
| US5913001A | Optical connector assembling adhesive injection pipe and method of assembling an optical connector using the same | Physics | 54 | Expired |
| US5712632A | Navigation apparatus for land vehicle inputting road traffic information | Physics | 54 | Expired |
| US7090409B2 | Optical functioning component and optical connector having optical functioning component | Physics | 53 | Expired |
| US7118283B2 | Optical connector plug, optical connector adapter and optical connector | Physics | 49 | Expired |
| US4918264A | Actuating mechanism and multiposition rubber or membrane switch device | Electricity | 41 | Expired |
| US6486419B2 | Multifunctional image forming apparatus having a covered main power switch | Electricity | 37 | Expired |
| US5544087A | Navigation system | Physics | 29 | Expired |
| US6431783B1 | Optical fiber connecting structure and connecting member for connecting an optical fiber cable to a ferrule | Physics | 27 | Expired |
| US5877098A | Abrasive sheet made of very fine and ultrafine fibers | Emerging Cross-Sectional Technologies | 23 | Expired |
| US6075958A | Image forming apparatus with first and second openable covers | Physics | 21 | Expired |
| US5649130A | Cleaning sheet, a cleaning member and a cleaning apparatus for a fuser roll | Physics | 19 | Expired |
| US4523323A | Digital signal communication system for multi-level modulation including unique encoder and decoder | Electricity | 19 | Expired |
| US6565261B1 | Optical fiber connector | Physics | 16 | Expired |
| US5621495A | Representation of depth of field in camera | Physics | 15 | Expired |
| US4961190A | (1+N) Hitless channel switching system | Electricity | 13 | Expired |
| US5019852A | Representation of depth of field in camera | Physics | 12 | Expired |
| US6419401B1 | Optical connector ferrule | Physics | 12 | Expired |
| US4949118A | Indicating apparatus within finder of single-lens reflex camera | Physics | 12 | Expired |
| US4196171A | Apparatus for making a single crystal of III-V compound semiconductive material | Emerging Cross-Sectional Technologies | 12 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.