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Document Title |
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JP52028299 |
PURPOSE: Double detection of the tunnel fire and traffic snarl free from malfunction caused by headlights through alternate detection of the radiant energy which has a special wavelength range near the boundary between infrared rays and ...
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JP52020534 |
PURPOSE: To provid a concentrated alarm system for trains , with which the simplification of the wiring and circuit construction and reliability of apparatus are realized by providing an indication drive circuit for driving the indicatio...
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JP52002930 |
PURPOSE: Warning indicator system for vehicle, indicates warning signal according to priovity between the signals.
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JP52000198 |
PURPOSE: To inform emergency by utilizing wired broadcasting line upon receipt via wireless repeater of signal from portable or stationary wireless transmitter.
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