GB1220060A
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Improvements in or relating to mains supply signalling and/or control systems
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GB1223553A
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Improvements in or relating to digital signal transmission systems
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DE1254175B
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Data transfer procedure
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GB1188281A
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Improvements in or relating to Detection Means for Frequency Modulated Signals
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GB1151421A
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Improvements in or relating to Data Transmission Systems
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GB1148871A
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Improvements in or relating to signal transmission systems
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GB1146583A
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Improvements in or relating to information communication systems
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GB1122802A
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Improvements in or relating to multi-frequency data transmission systems
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GB1122801A
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Improvements in or relating to the transmission of pulse coded information
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GB1102751A
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Improvements in or relating to communication systems for interlinking remote stations
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GB1102581A
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Improvements in or relating to the control of hydro-electric generators
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GB1089432A
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Improvements in or relating to information transmission systems
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CA822760A
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Data transmission systems
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CA878748A
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Signal transmission systems
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