Sonic Systems, Inc.
10Patents
0Active
10Granted
29Portfolio score
Filing activity: Jun 12, 1991 → Oct 19, 2000
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5710555A | Siren detector | Physics | 37 | Expired |
| US5359158A | Ceiling-mounted loudspeaker | Electricity | 25 | Expired |
| US6597797B1 | Spherical loudspeaker system with enhanced performance | Electricity | 20 | Expired |
| US6603862B1 | Spherical loudspeaker system | Electricity | 20 | Expired |
| US5268538A | Hemispherically wide-radiating-angle loudspeaker system | Electricity | 19 | Expired |
| US5952620A | Omni-directional sub-bass loudspeaker | Electricity | 9 | Expired |
| USD341592S | Ceiling-mounted loudspeaker | General | 8 | Expired |
| US6738483B1 | Overhead loudspeaker systems | Electricity | 7 | Expired |
| US5910929A | Audio railway crossing detector | Emerging Cross-Sectional Technologies | 6 | Expired |
| US6636610B1 | Loudspeaker systems | Electricity | 4 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.