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| Number | Title | Issue Date |
| 7327282 | Information system An information system is provided for transmitting data into a local area surrounding the transmitter. The transmitter may be used to provide information to pedestrians, or to passing road traffic. Data is stored in a local memory 64 associated with the trans... | 02/05/2008 |
| 6606033 | Information system An information system is provided for transmitting data into a local area surrounding the transmitter. The transmitter may be used to provide information to pedestrians, or to passing road traffic. Data is stored in a local memory 64 associated with the t... | 08/12/2003 |