InterDigital Technology Corporation
2,126Patents
1,174Active
2,126Granted
58Portfolio score
Filing activity: Dec 14, 1990 → Apr 3, 2024 · 656 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5506864A | CDMA communications and geolocation system and method | Electricity | 313 | Expired |
| US6157619A | Code division multiple access (CDMA) communication system | Emerging Cross-Sectional Technologies | 297 | Expired |
| US5359182A | Wireless telephone debit card system and method | Electricity | 244 | Expired |
| US5228056A | Synchronous spread-spectrum communications system and method | Electricity | 236 | Expired |
| US5687194A | Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels | Emerging Cross-Sectional Technologies | 234 | Expired |
| US8817741B2 | Method and apparatus for resource management in handover operation | Electricity | 228 | Active |
| US6771957B2 | Cognition models for wireless communication systems and method and apparatus for optimal utilization of a radio channel based on cognition model data | Electricity | 218 | Expired |
| US5289497A | Broadcast synchronized communication system | Electricity | 208 | Expired |
| US5614914A | Wireless telephone distribution system with time and space diversity transmission for determining receiver location | Electricity | 205 | Expired |
| US5703874A | Broadband CDMA overlay system and method | Electricity | 201 | Expired |
| US6898197B1 | Geolocation of a mobile terminal in a CDMA communication system | Electricity | 191 | Expired |
| US7460834B2 | Method and apparatus for utilizing a directional beam antenna in a wireless transmit/receive unit | Electricity | 191 | Expired |
| US6289004A | Adaptive cancellation of fixed interferers | Electricity | 187 | Expired |
| US7308264B2 | Method for identifying pre-candidate cells for a mobile unit operating with a switched beam antenna in a wireless communication system, and corresponding system | Electricity | 183 | Active |
| US7274936B2 | Method and apparatus for measuring channel quality using a smart antenna in a wireless transmit/receive unit | Electricity | 182 | Expired |
| US7324817B2 | Wireless communication method and apparatus for selecting and reselecting cells based on measurements performed using directional beams and an omni-directional beam pattern | Electricity | 179 | Active |
| US7289828B2 | Method for steering a smart antenna for a WLAN using a periodic re-scan | Emerging Cross-Sectional Technologies | 176 | Expired |
| US5260967A | CDMA/TDMA spread-spectrum communications system and method | Electricity | 172 | Expired |
| US5799010A | Code division multiple access (CDMA) communication system | Emerging Cross-Sectional Technologies | 171 | Expired |
| US8131295B2 | Methods and system for performing handover in a wireless communication system | Electricity | 171 | Active |
| US7633442B2 | Satellite communication subscriber device with a smart antenna and associated method | Electricity | 166 | Expired |
| US5469468A | Overlaying spread-spectrum satellite system and method | Electricity | 160 | Expired |
| US7123191B2 | Blind signal separation using I and Q components | Electricity | 159 | Expired |
| US5365544A | CDMA communications and geolocation system and method | Electricity | 148 | Expired |
| US5657358A | Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or plurality of RF channels | Emerging Cross-Sectional Technologies | 145 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.