Matthew Polk
32Patents
16h-index
23Co-inventors
81Inventor score
Filing activity: Mar 4, 1977 → Aug 11, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7039212B2 | Weather resistant porting | Electricity | 170 | Expired |
| US4569074A | Method and apparatus for reproducing sound having a realistic ambient field and acoustic image | Electricity | 66 | Expired |
| US4489432A | Method and apparatus for reproducing sound having a realistic ambient field and acoustic image | Electricity | 58 | Expired |
| US4497064A | Method and apparatus for reproducing sound having an expanded acoustic image | Electricity | 57 | Expired |
| US4903300A | Compact and efficient sub-woofer system and method for installation in structural partitions | Electricity | 35 | Expired |
| US6937737B2 | Multi-channel audio surround sound from front located loudspeakers | Electricity | 30 | Expired |
| US4638505A | Optimized low frequency response of loudspeaker systems having main and sub-speakers | Electricity | 26 | Expired |
| USD251973S | Speaker cabinet | General | 23 | Expired |
| US4759066A | Sound system with isolation of dimensional sub-speakers | Electricity | 21 | Expired |
| US5517573A | Ported loudspeaker system and method with reduced air turbulence | Electricity | 19 | Expired |
| US4630298A | Method and apparatus for reproducing sound having a realistic ambient field and acoustic image | Electricity | 18 | Expired |
| USD693375S1 | Tractor | General | 18 | Active |
| US6721434B2 | Loudspeaker mounting system | Electricity | 17 | Expired |
| US4924963A | Compact and efficient sub-woofer system and method for installation in structural partitions | Electricity | 17 | Expired |
| USD693374S1 | Tractor | General | 16 | Active |
| US5809154A | Ported loudspeaker system and method | Electricity | 16 | Expired |
| US7162049B2 | Ported loudspeaker system and method with reduced air turbulence, bipolar radiation pattern and novel appearance | Electricity | 15 | Expired |
| USD350135S | Enclosed speaker for vehicle use | General | 11 | Expired |
| US5475764A | Bandpass woofer and method | Electricity | 11 | Expired |
| US7231053B2 | Enhanced multi-channel audio surround sound from front located loudspeakers | Electricity | 10 | Expired |
| US10317373B2 | Direct field acoustic testing in a semi-reverberant enclosure | Electricity | 8 | Active |
| US4413162A | Moving coil transducers using multiple-stranded coils | Electricity | 8 | Expired |
| US4350847A | Subwoofer system using a passive radiator | Electricity | 7 | Expired |
| US7817812B2 | Compact audio reproduction system with large perceived acoustic size and image | Electricity | 5 | Active |
| US4177431A | Loudspeaker-cable interface | Electricity | 5 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.