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CA1066570A
|
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Optical fibres
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CA1088658A
|
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Stripe lasers
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CA1097110A
|
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Optical fiber connector
|
|
CA1059668A
|
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Multi-frequency generator using digital technique
|
|
CA1079879A
|
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Line circuit for key telephone systems
|
|
CA1073135A
|
|
Line circuit for key telephone systems
|
|
CA1067633A
|
|
Key telephone system interconnection apparatus
|
|
CA1067634A
|
|
Line circuit for key telephone systems
|
|
CA1069964A
|
|
Miniature relay with bearing supports associated with the housing
|
|
CA1068406A
|
|
Spoken message transmission device
|
|
CA1019828A
|
|
Continuous train control system
|
|
CA1041201A
|
|
Intra link calling within a subscriber digital system
|
|
CA1039421A
|
|
Subscriber digital multiplexing system with time division concentration
|
|
US4001514A
|
|
Subscriber digital multiplexing system with time division concentration
|
|
CA992185A
|
|
Telephone intercommunicating system
|
|
CA1039854A
|
|
Delta modulation apparatus
|
|
CA1013874A
|
|
Line circuit for telecommunications exchange using tdm
|
|
CA1004786A
|
|
Push-button calling circuits for telephone sets
|
|
CA1057443A
|
|
Diallyl esters of dicarboxylic acids
|
|
CA1007428A
|
|
Machine and method for assembling pistons into engines
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