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DK3563C
(en)
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Procedure with associated telegraph apparatus on telephone lines.
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NL169009C
(en)
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TELECOMMUNICATIONS SYSTEM.
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DK3104C
(en)
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Automatic Telephone Setup System.
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DK4147C
(en)
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Telephone system with associated Device.
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CH24076A
(en)
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Cooling, resp. Ventilation apparatus
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DK3629C
(en)
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Telegraph.
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DK1700C
(en)
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Field, Telephone and Telegraph Apparatus.
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GB190000209A
(en)
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An Improved Steam-overheating Apparatus.
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GB189914207A
(en)
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Improved Telephone Apparatus.
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DK3007C
(en)
|
|
Typographic Telegraph.
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ES25580A1
(en)
|
|
An autocopier and electro-chemical telegraph.
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DK4095C
(en)
|
|
Typographic Telegraph.
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ES26003A1
(en)
|
|
Improvements in telegraphic devices.
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DK2796C
(en)
|
|
Writing telegraph device.
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CA81564A
(en)
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|
Apparatus for telegraphing on telephone lines
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DK3464C
(en)
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Dejæltemaskine til Anbringelse paa Dejtrug.
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DK2893C
(en)
|
|
Automatic Telephone Connector.
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DK5850C
(en)
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|
Adjustable Speaker for Telephone Devices.
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ES26844A1
(en)
|
|
An electro-automatic conveyor device.
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GB189914540A
(en)
|
|
An Improved Picture-suspending Device.
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CA101346A
(en)
|
|
Selective telephone system
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CA93219A
(en)
|
|
Diffusion apparatus
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DK5954C
(en)
|
|
Apparatus for Telegraphy and Telephony Using Non-Insulated Submarine Cables.
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|
DK5934C
(en)
|
|
Corrosion Apparatus.
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GB190320795A
(en)
|
|
Improved Self-cooking Apparatus.
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