SK Telecom Co., Ltd.
1,094Patents
994Active
1,094Granted
67Portfolio score
Filing activity: Apr 4, 1997 → Jun 10, 2024 · 222 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US9973518B2 | Apparatus and method for checking message and user terminal | Electricity | 190 | Active |
| US6477154B1 | Microcellular mobile communication system | Emerging Cross-Sectional Technologies | 141 | Expired |
| USD549756S1 | Home service robot | General | 140 | Expired |
| US6259923A | Method for providing cell location service | Electricity | 102 | Expired |
| US6892071B2 | Handover method in wireless telecommunication system supporting USTS | Electricity | 95 | Expired |
| US6738597B1 | Repeating installation using telephone line | Electricity | 77 | Expired |
| US7145890B1 | Method for carrying out handoff between macrocell and microcell in hierarchical cell structure | Electricity | 50 | Expired |
| US7257416B2 | Mobile location based service system and method | Electricity | 48 | Expired |
| USD797073S1 | Voice recognition speaker | General | 43 | Active |
| US6097949A | Method for providing closed user group service in mobile communication network | Electricity | 35 | Expired |
| US7813291B2 | Method and apparatus for requesting and reporting channel quality information in mobile communication system | Electricity | 35 | Expired |
| US7324478B2 | Apparatus and method for deciding access system based on WLAN signal strength in WLAN/mobile network interworking system, and mobile terminal therefor | Electricity | 35 | Expired |
| US7865198B2 | Method for message exchanging service between residential device and mobile terminal | Electricity | 30 | Active |
| US7768966B2 | Method for traffic indication and channel adaptation for sleep mode terminals, and an apparatus thereof | Electricity | 29 | Expired |
| US7200127B1 | Apparatus and method for controlling a power of reverse link in CDMA system | Electricity | 29 | Expired |
| US7221952B2 | Method for processing address of short message service center in IMT-2000 asynchronous network | Electricity | 28 | Expired |
| US7272117B2 | Method and based station for transmitting data using adaptive coding scheme at physical layer in W-CDMA system | Electricity | 26 | Expired |
| US7752519B2 | Method for creating feedback message for ARQ in mobile communication system | Electricity | 26 | Active |
| US9930358B2 | Method and apparatus for encoding/decoding images using adaptive motion vector resolution | Electricity | 25 | Active |
| US7551937B2 | Method and device for allocating radio resources in wireless portable network system | Emerging Cross-Sectional Technologies | 25 | Expired |
| US7631239B2 | Method for retransmitting packet in mobile communication system and computer-readable medium recorded program thereof | Electricity | 24 | Expired |
| US6999772B2 | Channel assignment method for multi-FA CDMA cellular systems | Emerging Cross-Sectional Technologies | 23 | Expired |
| US8074138B2 | Decoding apparatus and method thereof | Electricity | 23 | Active |
| US7218928B2 | Network analyzing method and apparatus for optimal performance of network, and a recording medium having programs to conduct said method | Electricity | 22 | Expired |
| US8711935B2 | Apparatus and method for image encoding/decoding using predictability of intra-prediction mode | Electricity | 21 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.