Itsuki Ban
41Patents
13h-index
18Co-inventors
74Inventor score
Filing activity: Oct 15, 1973 → Sep 15, 1987
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4712003A | Blind person guide device | Physics | 32 | Expired |
| US4437029A | Direct current motor | Electricity | 27 | Expired |
| US4342884A | Piston unit | Mechanical Engineering; Lighting; Heating | 26 | Expired |
| US4197475A | Direct current motor with double layer armature windings | Electricity | 25 | Expired |
| US4072881A | Axial-air-gap type semiconductor electric motor | Electricity | 23 | Expired |
| US4645991A | Apparatus for removing torque ripples in direct-current motors | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4612486A | Semiconductor electric motor having a rotary transformer to excite a rotor | Electricity | 21 | Expired |
| US4227107A | Direct current motor with double layer armature windings | Electricity | 21 | Expired |
| US4583016A | Direct current motor | Electricity | 19 | Expired |
| US4755728A | Single-phase semiconductor electric motor and fan using the same | Electricity | 19 | Expired |
| US4546294A | Apparatus for removing torque ripples in a direct current motor | Emerging Cross-Sectional Technologies | 17 | Expired |
| US4404485A | Direct current motor | Electricity | 16 | Expired |
| US4107587A | Three-phase DC motor having non-superimposed armature coils | Electricity | 14 | Expired |
| US4031556A | Mode changeover apparatus for recorder/player | Physics | 13 | Expired |
| US4130780A | Electronic photoflash | Electricity | 13 | Expired |
| US4243902A | Direct current motor with non-superposed armature windings | Electricity | 13 | Expired |
| US4433362A | Remotely controllable illumination apparatus | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4159492A | Automatic reverse apparatus for magnetic recorder/player | Physics | 12 | Expired |
| US4447751A | Direct current motor | Electricity | 12 | Expired |
| US4290685A | Remote control device for camera | Physics | 12 | Expired |
| US4648710A | Blind guide device | Emerging Cross-Sectional Technologies | 11 | Expired |
| US4698563A | Semiconductor electric motor having a rotary transformer to excite a rotor | Electricity | 10 | Expired |
| US3997129A | Magnetic recording/reproducing apparatus | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4315177A | Direct current motor with non-superposed armature windings | Electricity | 8 | Expired |
| US4129889A | Magnetic recording/reproducing apparatus using cassette | Physics | 6 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.