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| Number | Title | Issue Date |
| 5228026 | Technique for time-division duplex cordless telecommunication A communication procedure suitable for a cordless telephone system involves time division duplex radio communication between a handset 11 and a base station using alternating bursts of transmission over a single radio channel. Once a radio link has been s... | 07/13/1993 |
| 5208812 | Telecommunications system A communication procedure suitable for a cordless telephone system involves time division duplex radio communication between a handset 11 and a base station 3 using alternating bursts of transmission over a single radio channel. Once a radio link has been... | 05/04/1993 |
