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DK20075C
(en)
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Connecting device for Part subscribers in Telephone systems.
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DK19678C
(en)
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Telephone system.
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DK18316C
(en)
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Telephone system connection device with Selectors.
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DK23108C
(en)
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Reinforcement device for normal Telephone Stations.
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AT82832B
(en)
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Telephone switching system.
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DK33751C
(en)
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Line amplifier device for Telephone cables.
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DK17025C
(en)
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Connecting device for semi-automatic Telephone systems.
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DK17874C
(en)
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Connecting device for semi-automatic Telephone systems.
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AT80094B
(en)
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Semi-automatic telephone system. Semi-automatic telephone system.
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ES50652A1
(en)
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Improvements in telephone exchange systems.
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DK18827C
(en)
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Circuit Device for Telephone Systems.
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DK19578C
(en)
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Connecting device for intermediate city Telephone traffic.
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DK22408C
(en)
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Telephone station.
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DK34938C
(en)
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Telephone system.
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DK18997C
(en)
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Telephone system.
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DK22593C
(en)
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Telephone system.
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DK14530C
(en)
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Connection to the Wires in Automatic Telephone Systems.
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GB100941A
(en)
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Improvements in Telephone Systems.
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GB103880A
(en)
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Improvements in Telephone Systems.
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DK22255C
(en)
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Selector for Making Connections in Telephone Systems.
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DK14613C
(en)
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Connecting device for semi-automatic Telephone exchanges.
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DK32848C
(en)
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Telephone exchange system.
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GB191302397A
(en)
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Improvements in Telephone Systems.
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DK20370C
(en)
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Telephone exchange system.
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DK21551C
(en)
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Telephone system connection device in which the connections are provided via Selectors.
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