Osamu Tanaka
170Patents
26h-index
272Co-inventors
93Inventor score
Filing activity: May 31, 1974 → Nov 2, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4599598A | Data transmission system utilizing power line | Electricity | 249 | Expired |
| US5772884A | Porous polytetrafluoroethylene film and process for preparation thereof | Emerging Cross-Sectional Technologies | 87 | Expired |
| US4571844A | Angle change detector | Physics | 87 | Expired |
| US5234739A | Polytetrafluoroethylene porous film and preparation and use thereof | Emerging Cross-Sectional Technologies | 81 | Expired |
| US5759671A | Ultraviolet luminescent retroreflective sheeting | Emerging Cross-Sectional Technologies | 72 | Expired |
| US5064593A | Process for producing multilayer polytetrafluoroethylene porous membrane | Performing Operations; Transporting | 57 | Expired |
| US6261979A | Filter medium and air filter unit using the same | Emerging Cross-Sectional Technologies | 51 | Expired |
| US4939381A | Power supply system for negative impedance discharge load | Electricity | 51 | Expired |
| US5363277A | Structure and method for mounting semiconductor device | Emerging Cross-Sectional Technologies | 48 | Expired |
| US3990923A | Method of producing grain oriented electromagnetic steel sheet | Chemistry; Metallurgy | 45 | Expired |
| US5225131A | Process for producing multilayer polytetrafluoroethylene porous membrane and semisintered polytetrafluoroethylene multilayer structure | Performing Operations; Transporting | 44 | Expired |
| US5327921A | Processing vessel for a wafer washing system | Emerging Cross-Sectional Technologies | 42 | Expired |
| US5562986A | Polytetrafluoroethylene fibers, polytetrafluoroethylene materials and process for preparation of the same | Emerging Cross-Sectional Technologies | 41 | Expired |
| US6682576B1 | Air filter medium, process of producing filter medium, air filter pack for air filters, and air filter unit for air filters | Emerging Cross-Sectional Technologies | 39 | Expired |
| US5409515A | Filter apparatus and filter element | Performing Operations; Transporting | 38 | Expired |
| US4519649A | Wheelchair | Emerging Cross-Sectional Technologies | 37 | Expired |
| US5182660A | Back-light type liquid crystal display | Physics | 36 | Expired |
| US4999398A | Methods for making polydiorganosiloxane microemulsions | Chemistry; Metallurgy | 34 | Expired |
| US6416562B1 | Air filter medium, air filter pack and air filter unit comprising the same, and method for producing air filter medium | Emerging Cross-Sectional Technologies | 33 | Expired |
| US5853123A | Signal transmission/reception device of air conditioner | Electricity | 33 | Expired |
| US5359154A | Conveyor apparatus having plural conveyors with equalized conveying speeds controlled by an inverter means | Electricity | 31 | Expired |
| US5217666A | Process for producing porous polytetrafluoroethylene film | Chemistry; Metallurgy | 29 | Expired |
| US5812316A | Method for making retroreflective sheeting | Physics | 28 | Expired |
| US5243727A | Floor polisher | Emerging Cross-Sectional Technologies | 28 | Expired |
| US4934003A | Device for transferring the disabled | Emerging Cross-Sectional Technologies | 28 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.