Spreadtrum Communications
🏢 View company profile →36Patents
23Active
36Granted
47Portfolio score
Filing activity: Apr 9, 2002 → Dec 31, 2012 · 22 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7519390B2 | Transmitter and receiver architecture for multi-mode wireless device | Electricity | 22 | Expired |
| US7158795B2 | Dummy PCH block detection for power saving in GSM handset | Emerging Cross-Sectional Technologies | 18 | Expired |
| US7248896B2 | Desktop cellular phone having SIM card-related security features | Electricity | 12 | Expired |
| US7676211B2 | Reconfigurable baseband filter | Electricity | 8 | Active |
| US7853258B2 | Methods for air interface message transfer in fast call setup processes | Electricity | 6 | Active |
| US6784693B2 | I/O buffer having a protection circuit for handling different voltage supply levels | Electricity | 5 | Expired |
| US7688880B2 | Method and apparatus for reduced noise and carrier feedthrough in multimode transmitter | Electricity | 4 | Active |
| US7725090B2 | Method and apparatus for automatic frequency correction | Electricity | 4 | Active |
| US7738429B2 | Method and system for uplink synchronization | Electricity | 3 | Active |
| US8073478B2 | Multi-party digital intercommunication systems and associated methods of operation | Electricity | 3 | Active |
| US7853259B2 | Methods for air interface message transfer in fast call setup processes | Electricity | 2 | Active |
| US6735130B2 | Differential voltage memory bus | Physics | 2 | Expired |
| US7171162B2 | Method and apparatus for frequency estimation using iterative filtering in a GSM communications system | Electricity | 2 | Expired |
| US7200194B2 | Receiver signal dynamic range compensation based on received signal strength indicator | Electricity | 2 | Expired |
| US7327208B2 | Printed circuit board including a notch filter for attenuating radio frequency interference | Electricity | 2 | Expired |
| US8139634B2 | Methods and apparatuses of fast cross motion estimation for video encoding | Electricity | 2 | Active |
| US7110478B2 | Phase difference based frequency correction channel detector for wireless communication system | Electricity | 2 | Expired |
| US7921008B2 | Methods and apparatus for voice activity detection | Physics | 2 | Active |
| US7245878B2 | Method and apparatus for silent frame detection in a GSM communications system | Electricity | 2 | Expired |
| US7711341B2 | Multimode receiver control method and apparatus | Electricity | 2 | Active |
| US7664113B2 | Apparatus and methods for system multiplexing and program element identification | Electricity | 1 | Active |
| US8072960B2 | Networking method of single frequency network in TD-SCDMA system | Electricity | 1 | Active |
| US7738532B2 | Method and apparatus of channel estimation in an intra-frequency cell | Electricity | 1 | Active |
| US8139529B2 | TD-SCDMA based SFN network and associated methods | Electricity | 1 | Active |
| US8175866B2 | Methods and apparatus for post-processing of speech signals | Physics | 1 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.