Digisonix LLC
32Patents
0Active
32Granted
37Portfolio score
Filing activity: Feb 11, 1993 → Feb 21, 2001
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5706344A | Acoustic echo cancellation in an integrated audio and telecommunication system | Physics | 134 | Expired |
| US5586190A | Active adaptive control system with weight update selective leakage | Physics | 82 | Expired |
| US6505057B1 | Integrated vehicle voice enhancement system and hands-free cellular telephone system | Physics | 81 | Expired |
| US6549629B2 | DVE system with normalized selection | Electricity | 72 | Expired |
| US6496581B1 | Coupled acoustic echo cancellation system | Electricity | 46 | Expired |
| US5386477A | Active acoustic control system matching model reference | Physics | 38 | Expired |
| US5715320A | Active adaptive selective control system | Physics | 33 | Expired |
| US5602928A | Multi-channel communication system | Physics | 32 | Expired |
| US6094601A | Adaptive control system with efficiently constrained adaptation | Physics | 32 | Expired |
| US5633795A | Adaptive tonal control system with constrained output and adaptation | Physics | 29 | Expired |
| US5693918A | Active exhaust silencer | Physics | 28 | Expired |
| US5710822A | Frequency selective active adaptive control system | Physics | 25 | Expired |
| US5561598A | Adaptive control system with selectively constrained ouput and adaptation | Human Necessities | 23 | Expired |
| US5541373A | Active exhaust silencer | Physics | 22 | Expired |
| US6295364A | Simplified communication system | Physics | 21 | Expired |
| US5513266A | Integral active and passive silencer | Physics | 19 | Expired |
| US5621803A | Active attenuation system with on-line modeling of feedback path | Physics | 18 | Expired |
| US5680337A | Coherence optimized active adaptive control system | Physics | 18 | Expired |
| US5701350A | Active acoustic control in remote regions | Physics | 16 | Expired |
| US5446249A | Dry acoustic system preventing condensation | Physics | 16 | Expired |
| US5590205A | Adaptive control system with a corrected-phase filtered error update | Physics | 15 | Expired |
| US5557682A | Multi-filter-set active adaptive control system | Physics | 13 | Expired |
| US5586189A | Active adaptive control system with spectral leak | Electricity | 12 | Expired |
| US5602929A | Fast adapting control system and method | Physics | 12 | Expired |
| US6295363A | Adaptive passive acoustic attenuation system | Physics | 11 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.