Rohm Co., Ltd.
6,307Patents
3,833Active
6,307Granted
58Portfolio score
Filing activity: Feb 18, 1971 → Aug 19, 2024 · 854 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7046082B2 | Electronic device having sound output module | Electricity | 999 | Expired |
| US8310188B2 | Motor drive circuit with short startup time | Electricity | 998 | Active |
| US7848066B2 | Motor drive device and electronic device using the same | Electricity | 996 | Active |
| US8044604B2 | Inverter | Electricity | 970 | Active |
| US6465892B1 | Interconnect structure for stacked semiconductor device | Electricity | 533 | Expired |
| US6472293B2 | Method for manufacturing an interconnect structure for stacked semiconductor device | Electricity | 316 | Expired |
| US6680959B2 | Semiconductor light emitting device and semiconductor laser | Electricity | 289 | Expired |
| US5051688A | Crossed coil meter driving device having a plurality of input parameters | Physics | 261 | Expired |
| US8017932B2 | Light-emitting device | Electricity | 213 | Active |
| US6075520A | Small current detector circuit and locator device using the same | Physics | 212 | Expired |
| US7446567B2 | Signal transmission apparatus and interconnection structure | Electricity | 196 | Active |
| US6133637A | Semiconductor device having a plurality of semiconductor chips | Electricity | 193 | Expired |
| US6088063A | Data encoding method and apparatus for outputting encoded data at a designated time | Electricity | 187 | Expired |
| US5479486A | Cordless telephone set having a warning signal representing that a storage battery is not being charged | Emerging Cross-Sectional Technologies | 183 | Expired |
| US5283425A | Light emitting element array substrate with reflecting means | Electricity | 183 | Expired |
| US7515124B2 | Organic EL drive circuit and organic EL display device using the same organic EL drive circuit | Physics | 180 | Active |
| US7466566B2 | DC-AC converter, controller IC therefor, and electronic apparatus utilizing such DC-AC converter | Emerging Cross-Sectional Technologies | 174 | Expired |
| US7560915B2 | Power supply apparatus provided with regulation function and boosting of a regulated voltage | Electricity | 172 | Expired |
| US7608810B2 | Semiconductor device, module, and electronic device including a conversion circuit having a second switch rendered conductive together with a first switch | Electricity | 155 | Active |
| US5686940A | Display apparatus | Physics | 145 | Expired |
| US5349221A | Semiconductor memory device and method of reading out information for the same | Electricity | 140 | Expired |
| US5305276A | Non-volatile IC memory | Physics | 138 | Expired |
| US7132691B1 | Semiconductor light-emitting device and method for manufacturing the same | Electricity | 136 | Expired |
| US5949639A | Capacitor element for solid electrolytic capacitor, device and process for making the same | Emerging Cross-Sectional Technologies | 127 | Expired |
| US6054716A | Semiconductor light emitting device having a protecting device | Emerging Cross-Sectional Technologies | 127 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.