TDK CORPORATION
7,981Patents
4,702Active
7,981Granted
57Portfolio score
Filing activity: Apr 20, 1979 → Nov 13, 2024 · 1,514 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6294274A | Oxide thin film | Emerging Cross-Sectional Technologies | 3,995 | Expired |
| US8369056B2 | Power supply control device, method for controlling power supply, program and power supply device | Electricity | 811 | Active |
| US7274334B2 | Stacked multi-resonator antenna | Electricity | 318 | Expired |
| US9143010B2 | Wireless power transmission system for selectively powering one or more of a plurality of receivers | Electricity | 269 | Active |
| US5923544A | Noncontact power transmitting apparatus | Electricity | 252 | Expired |
| US5946206A | Plural parallel resonant switching power supplies | Emerging Cross-Sectional Technologies | 236 | Expired |
| US7656167B1 | Electric field generator incorporating a slow-wave structure | Electricity | 228 | Active |
| US5434549A | Moving magnet-type actuator | Electricity | 226 | Expired |
| US7863095B2 | Method of manufacturing layered chip package | Electricity | 226 | Active |
| US6045626A | Substrate structures for electronic devices | Electricity | 213 | Expired |
| US6888728B2 | Switching power supply unit | Emerging Cross-Sectional Technologies | 196 | Expired |
| US7199680B2 | RF module using mode converting structure having short-circuiting waveguides and connecting windows | Electricity | 193 | Expired |
| US6049167A | Organic electroluminescent display device, and method and system for making the same | Electricity | 185 | Expired |
| US5640067A | Thin film transistor, organic electroluminescence display device and manufacturing method of the same | Emerging Cross-Sectional Technologies | 183 | Expired |
| US6037712A | Organic electroluminescence display device and producing method thereof | Emerging Cross-Sectional Technologies | 182 | Expired |
| US5801105A | Multilayer thin film, substrate for electronic device, electronic device, and preparation of multilayer oxide thin film | Electricity | 182 | Expired |
| US5828080A | Oxide thin film, electronic device substrate and electronic device | Electricity | 175 | Expired |
| US5810923A | Method for forming oxide thin film and the treatment of silicon substrate | Electricity | 173 | Expired |
| US4850534A | Ultrasonic wave nebulizer | Performing Operations; Transporting | 148 | Expired |
| US5635308A | Phenylanthracene derivative and organic EL element | Emerging Cross-Sectional Technologies | 145 | Expired |
| US4629464A | Porous hydroxyapatite material for artificial bone substitute | Chemistry; Metallurgy | 145 | Expired |
| US6246552A | Read/write head including displacement generating means that elongates and contracts by inverse piezoelectric effect of electrostrictive effect | Physics | 139 | Expired |
| US5711763A | Composite biological implant of a ceramic material in a metal substrate | Human Necessities | 137 | Expired |
| US5205745A | Artificial dental root | Human Necessities | 137 | Expired |
| US5364219A | Apparatus for clean transfer of objects | Emerging Cross-Sectional Technologies | 131 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.