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DK2839C
(en)
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Device for automatically indicating at a telephone exchange station the end of a call.
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DK7512C
(en)
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Apparatus for Providing Connection between a Telephone Exchange Subscriber.
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DK18036C
(en)
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Automatic device for detecting calls on a telephone exchange.
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DK448C
(en)
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Apparatus for providing an automatic connection between two arbitrary subscriber lines at a telephone exchange.
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DK1018C
(en)
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Automatic Power Shutter for Telephone Stations.
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DK3951C
(en)
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Arrangement for the connection of the various expedition fields at telephone stations, so that the telephone operators could help each other.
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DK4602C
(en)
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Wire connection at telephone exchange stations.
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DK7880C
(en)
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Apparatus for automatically counting the number of connections made on a telephone line.
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DK12932C
(en)
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Device for Registering the Length of Telephone Calls.
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DK4272C
(en)
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Automatic telephone switching device.
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DK11435C
(en)
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Device for connecting the wires at automatic telephone stations with group division.
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DK988C
(en)
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Automatic Telephone Setup System.
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FR389133A
(en)
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Support for telephone receiver
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DK5683C
(en)
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Switching device for several call stations located on one line.
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DK7260C
(en)
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Electromagnetic Selection Apparatus for Use at the Central Station in a Group Line Telephone System.
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DK10331C
(en)
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Apparatus for the automatic distribution of the expedition to telephone exchanges.
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DK3738C
(en)
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Device for Setting the Duration of Phone Calls.
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DK5922C
(en)
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Calling device for automatically operating Telephone Systems.
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DK4639C
(en)
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Signal tubes for Multiplet telephone stations.
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DK7239C
(en)
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Central switching device for Telephone Systems.
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DK2211C
(en)
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Device for Receiving Payment for Telephone Calls.
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AT23494B
(en)
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Call counters for telephone exchanges.
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ES28439A1
(en)
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A universal download device for telephone exchanges.
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DK2694C
(en)
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Telephone Call Controller.
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DK9175C
(en)
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Telephoning apparatus for the clear transmission of high-distance tones.
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