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DK7239C
(en)
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Central switching device for Telephone Systems.
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DK7259C
(en)
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Device by Telephone Systems.
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DK7240C
(en)
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Device for Group Line Telephone Systems.
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DK5922C
(en)
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Calling device for automatically operating Telephone Systems.
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DK8494C
(en)
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Setting device for automatic Telephone Systems.
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DK8032C
(en)
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Device for switching devices.
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DK7821C
(en)
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Connection cable for Telephone system.
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DK7491C
(en)
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Device for Signaling Devices.
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DK7207C
(en)
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Device for Stopping the Sniper.
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DK7848C
(en)
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Alarm device for use with telephone sets.
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ES36679A1
(en)
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An Electrical Switching device entitled Electro-igniter-damper.
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DK9322C
(en)
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Switching device.
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DK7238C
(en)
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Device for Telephone Connections.
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ES35373A1
(en)
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An ideal revulsive device.
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CH39532A
(en)
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Telephone system
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CH35512A
(en)
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Central office switch for telephone systems
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DK7171C
(en)
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Telephone connection device.
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DK10356C
(en)
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Device for wireless signaling.
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DK8810C
(en)
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Device for Amplification of Telephone Streams.
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AT25443B
(en)
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Automatic telephone switch.
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DK7908C
(en)
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Distribution device for Centrifuges.
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DK11508C
(en)
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Disinfection device for Telephone Devices.
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DK7668C
(en)
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Device for switching off Railway signal lamps.
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DK7484C
(en)
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Telephone call counter.
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DK12083C
(en)
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Device for Switching Switches.
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