Joel Butler
24Patents
6h-index
17Co-inventors
66Inventor score
Filing activity: Oct 9, 2001 → Mar 2, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7084799B1 | Sigma-delta modulated amplifier | Electricity | 41 | Expired |
| US6563377B2 | Class D switching audio amplifier | Electricity | 41 | Expired |
| US6794932B1 | Class D switching audio amplifier | Electricity | 22 | Expired |
| US8582263B2 | Digitally controlled AC protection and attenuation circuit | Electricity | 19 | Active |
| US7301490B2 | Sigma-delta modulated power supply | Electricity | 11 | Expired |
| US8873211B1 | Performance and isolation improvements for digitally controlled AC attenuation and protection circuits | Electricity | 7 | Active |
| US10778160B2 | Class-D dynamic closed loop feedback amplifier | Electricity | 6 | Active |
| US9014390B2 | Digital communication system for loudspeakers | Electricity | 3 | Active |
| US9213345B2 | Digitally controlled AC protection and attenuation circuit | Electricity | 2 | Active |
| US9785160B2 | Digitally controlled AC protection and attenuation circuit | Electricity | 1 | Active |
| US9178352B2 | Performance and isolation improvements for digitally controlled AC attenuation and protection circuits | Electricity | 1 | Active |
| US11882421B2 | Multi-channel cinema amplifier with power-sharing, messaging and multi-phase power supply | Emerging Cross-Sectional Technologies | 0 | Active |
| US11095264B2 | Configurable modal amplifier system | Electricity | 0 | Active |
| US11121620B2 | Multi-channel cinema amplifier with power-sharing, messaging and multi-phase power supply | Emerging Cross-Sectional Technologies | 0 | Active |
| US10321232B2 | Distributed amplification for adaptive audio rendering systems | Electricity | 0 | Active |
| US9615169B2 | Digital communication system for loudspeakers | Electricity | 0 | Active |
| US11689860B2 | Multi-channel cinema amplifier with power-sharing, messaging and multi-phase power supply | Emerging Cross-Sectional Technologies | 0 | Active |
| US11418109B2 | Multi-channel cinema amplifier with power-sharing, messaging and multi-phase power supply | Emerging Cross-Sectional Technologies | 0 | Active |
| USD1043610S1 | Speaker | General | 0 | Active |
| US11290819B2 | Distributed amplification and control system for immersive audio multi-channel amplifier | Electricity | 0 | Active |
| US11601759B2 | Multi-channel cinema amplifier with power-sharing, messaging and multi-phase power supply | Emerging Cross-Sectional Technologies | 0 | Active |
| US10009688B2 | Digital communication system for loudspeakers | Electricity | 0 | Active |
| US10365673B2 | Digitally controlled AC protection and attenuation circuit | Electricity | 0 | Active |
| US8199918B2 | Loudspeaker protection circuit | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.