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IT1029118B
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Data transmission system for vehicle control - modulates pulse length and delayed pulses give carrier wave at receiver
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NL7502717A
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Data transmission system for vehicle control - modulates pulse length and delayed pulses give carrier wave at receiver
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DE2508550A1
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Data transmission system for vehicle control - modulates pulse length and delayed pulses give carrier wave at receiver
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FR2255001A5
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Radio signal system for roadways - uses pulse modulation of carrier wave and delayed retransmission
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DE2350134A1
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DEVICE FOR AUTOMATIC DISPLAY OF A VEHICLE THAT HAS SUCCESSED IN AN ACCIDENT IN A COLLISION
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FR2244363A5
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Device for temporarily holding a fire door open - two oppositely acting springs connect projecting and internal pistons
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