SIRF Technology, Inc.
🏢 View company profile →272Patents
97Active
272Granted
48Portfolio score
Filing activity: Apr 25, 1996 → May 20, 2011 · 97 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6531982B1 | Field unit for use in a GPS system | Physics | 251 | Expired |
| US6850557B1 | Signal detector and method employing a coherent accumulation system to correlate non-uniform and disjoint sample segments | Electricity | 249 | Expired |
| US6915208B2 | Information transfer in a multi-mode global positioning system used with wireless network | Physics | 205 | Expired |
| US6671620B1 | Method and apparatus for determining global position using almanac information | Physics | 183 | Expired |
| US6519466B2 | Multi-mode global positioning system for use with wireless networks | Physics | 181 | Expired |
| US6529829B2 | Dead reckoning system for reducing auto-correlation or cross-correlation in weak signals | Electricity | 175 | Expired |
| US6574558B2 | GPS receiver with cross-track hold | Electricity | 175 | Expired |
| US6900758B1 | System, method, apparatus and means for constructing building tomography and timing information | Physics | 169 | Expired |
| US6611757B2 | Global positioning system tag system | Physics | 169 | Expired |
| US6778136B2 | Fast acquisition of GPS signal | Physics | 168 | Expired |
| US6041280A | GPS car navigation system | Electricity | 161 | Expired |
| US6427120B1 | Information transfer in a multi-mode global positioning system used with wireless networks | Physics | 156 | Expired |
| US6522682B1 | Triple multiplexing spread spectrum receiver | Electricity | 150 | Expired |
| US6917331B2 | Signal detector employing coherent integration | Physics | 149 | Expired |
| US6618670B1 | Resolving time ambiguity in GPS using over-determined navigation solution | Physics | 149 | Expired |
| US6930634B2 | Shared memory architecture in GPS signal processing | Physics | 148 | Expired |
| US6950058B1 | System, method, apparatus and means for providing GPS aiding data to networked receivers | Electricity | 148 | Expired |
| US6747596B2 | Generic satellite positioning system receivers with programmable inputs | Physics | 145 | Expired |
| US6724342B2 | Compensation for frequency adjustment in mobile communication-positioning device with shared oscillator | Electricity | 144 | Expired |
| US6539304B1 | GPS navigation system using neural networks | Physics | 144 | Expired |
| US6738013B2 | Generic satellite positioning system receivers with selective inputs and outputs | Physics | 142 | Expired |
| US6389291B1 | Multi-mode global positioning system for use with wireless networks | Physics | 141 | Expired |
| US6885940B2 | Navigation processing for a satellite positioning system receiver | Physics | 140 | Expired |
| US7236883B2 | Aiding in a satellite positioning system | Physics | 137 | Expired |
| US6680695B2 | Communications system that reduces auto-correlation or cross-correlation in weak signals | Electricity | 119 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.