Koji Nageno
58Patents
18h-index
34Co-inventors
84Inventor score
Filing activity: Aug 13, 1985 → Jun 4, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5949896A | Earphone | Electricity | 291 | Expired |
| US5018599A | Headphone device | Electricity | 255 | Expired |
| US5406037A | Headphone including means for mounting belt-like suspender | Electricity | 221 | Expired |
| US6560346B2 | Pipe microphone device | Electricity | 156 | Expired |
| US6738487B1 | Earphone | Electricity | 123 | Expired |
| US5420935A | Auricle insertion headphone with improved grill | Electricity | 114 | Expired |
| US6728388B1 | Headphone | Electricity | 107 | Expired |
| US6625293B1 | Microphone | Electricity | 105 | Expired |
| US4736435A | Ear piece transducer | Electricity | 89 | Expired |
| US4874316A | Connector apparatus | Emerging Cross-Sectional Technologies | 86 | Expired |
| US8009853B2 | Headphone device | Electricity | 57 | Active |
| US6385325B1 | Headphone device | Electricity | 54 | Expired |
| US6970572B2 | Headphone device | Electricity | 48 | Expired |
| US7120268B2 | Headphone | Electricity | 30 | Expired |
| US5844998A | Headphone apparatus | Electricity | 30 | Expired |
| US8611581B2 | Earphone device | Electricity | 25 | Active |
| US5497427A | Headphone | Electricity | 24 | Expired |
| USRE37398E | Headphone | General | 23 | Expired |
| US8208676B2 | Earpiece and earphone | Electricity | 17 | Active |
| US7245736B2 | Headphone device | Electricity | 16 | Active |
| US10812926B2 | Sound output device, sound generation method, and program | Electricity | 16 | Active |
| US8208672B2 | Headphone | Electricity | 15 | Active |
| US8948435B2 | Driver unit and earphone device | Electricity | 13 | Active |
| US10685641B2 | Sound output device, sound output method, and sound output system for sound reverberation | Electricity | 10 | Active |
| US9020181B2 | Earphone device | Electricity | 9 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.