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EP1128557A2
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Switching circuit for generating pulsed power
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Relay type selecting circuit arrangement
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SE181840C1
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Selecting system
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Access arrangement for memory array
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Universal signal generator for generating telephone system high level signals
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Selective system
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Selective system
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Improvements in or relating to switching systems particularly for automatic telephones
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Control and holding circuit for relay matrices
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Improvements in or relating to switching networks
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Electronic ring circuit comprising plurality of first and second switching means driven by overlapping a.c. waveforms
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Improvements in or relating to magnetic core memory circuits
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Switch operating device
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Relaematris i synnerhet tungrelaematris foer vaeljarnaet
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Electrical selector circuit arrangements
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Status detector and memory arrangement
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Electrical pulse distributors
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Capacitor-transformer voltage equalization network for series connected transistor switches
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Plural gated pulse generators controlled by common feedback path
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Protective means for mercury arc devices
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Telephone-exchange apparatus.
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Amos p |