Ryoji Abe
26Patents
9h-index
41Co-inventors
75Inventor score
Filing activity: May 30, 1980 → Nov 13, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4932368A | Suction arrangement for internal combustion engine | Emerging Cross-Sectional Technologies | 24 | Expired |
| US5579397A | Amplifier device for a condenser microphone | Electricity | 23 | Expired |
| US4541399A | Breather arrangement for internal combustion engine | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US4305974A | Method of manufacturing a semiconductor device | Electricity | 19 | Expired |
| US4993370A | Valve driving mechanism for internal combustion engine | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US4603673A | Breather device in internal combustion engine | Mechanical Engineering; Lighting; Heating | 15 | Expired |
| US4729348A | Cylinder head structure for V-type engine | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US4343080A | Method of producing a semiconductor device | Electricity | 10 | Expired |
| US7130875B2 | Digital filter coefficient setting apparatus and digital filter coefficient setting method | Electricity | 9 | Expired |
| US5009205A | Crankshaft supporting structure for an internal combustion engine | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US6219392A | Filter device and method of acquiring filter coefficients | Electricity | 6 | Expired |
| US6404832B2 | Filter device and method of acquiring filter coefficients | Electricity | 5 | Expired |
| USD889407S1 | Lead acid battery | General | 4 | Active |
| US5040494A | Cooling apparatus for V-type internal combustion engine | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| US4627394A | Cylinder block for internal combustion engine | Mechanical Engineering; Lighting; Heating | 2 | Expired |
| US6914990B2 | Volume adjusting apparatus, method and computer program product | Electricity | 2 | Expired |
| US6214136A | Light-alloy casting heat treatment method | Chemistry; Metallurgy | 2 | Expired |
| USD890097S1 | Vent plug for lead acid battery | General | 2 | Active |
| US7227964B2 | Audio signal processing apparatus and audio signal processing method | Physics | 1 | Expired |
| US6937734B2 | Mute apparatus and mute method | Electricity | 1 | Expired |
| US7295670B2 | Howling suppression device and howling suppression method | Electricity | 1 | Expired |
| US8983338B2 | Image forming apparatus | Physics | 1 | Active |
| US7299100B2 | Digital signal processing apparatus and digital signal processing method | Physics | 0 | Expired |
| US10151505B2 | Air-conditioning apparatus | Emerging Cross-Sectional Technologies | 0 | Active |
| US9719709B2 | Air-conditioning apparatus with thermo-off postponement control | Mechanical Engineering; Lighting; Heating | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.