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DK17025C
(en)
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Connecting device for semi-automatic Telephone systems.
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DK17225C
(en)
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Connecting device for semi-automatic Telephone systems.
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DK15494C
(en)
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Connecting device for automatic telephone exchange systems.
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DK16820C
(en)
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Telephone system selector.
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DK14613C
(en)
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Connecting device for semi-automatic Telephone exchanges.
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DK22548C
(en)
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Coupling device for automatic and semi-automatic Telephone systems.
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NL3846C
(en)
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Automatic telephone system
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DK16333C
(en)
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Connecting device for automatic or semi-automatic Telephone systems.
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DK17180C
(en)
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Device for House Telephone Systems.
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DK28668C
(en)
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Connecting device for Pipes.
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DK16790C
(en)
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ATM for Telephone Devices.
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FR465092A
(en)
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Semi-automatic telephone system
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FR472430A
(en)
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Semi-automatic telephone system
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DK17069C
(en)
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Switching device for Telephone exchanges.
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DK18827C
(en)
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Circuit Device for Telephone Systems.
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DK20713C
(en)
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Coupling device for automatic or semi-automatic Telephone systems.
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AT82822B
(en)
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Telephone switching system.
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DK13495C
(en)
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Connection device for Telephone Dictation Systems.
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AT82883B
(en)
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Automatic telephone system.
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AT80094B
(en)
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Semi-automatic telephone system. Semi-automatic telephone system.
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CH57659A
(en)
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Device for semi-automatic telephone systems
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DK21510C
(en)
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Telephone exchange system.
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DK20075C
(en)
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Connecting device for Part subscribers in Telephone systems.
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DK20369C
(en)
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Signal device for Telephone exchanges with semi-automatic setting.
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GB191317417A
(en)
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Improved Circuit Arrangements for Telephone Systems.
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