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DK8844C
(en)
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Device for automatic connection between the participants in a telephone exchange.
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DK13958C
(en)
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Device for automatic connection between the Participants in a Telephone Exchange.
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AT25136B
(en)
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Automatic telephone exchange.
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GB190616321A
(en)
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Improvements in Automatic Couplings.
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DK10201C
(en)
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Automatic Telephone Centers.
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DK8494C
(en)
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Setting device for automatic Telephone Systems.
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GB191023669A
(en)
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Improvements in Automatic Telephone Systems.
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ES37770A1
(en)
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A perfected handset system.
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ES39414A1
(en)
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An automatic brace.
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DK8580C
(en)
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Device at Telephone exchanges with separate Plug operation.
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GB190817934A
(en)
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Improvements in Automatic Telephone Exchanges
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GB190616825A
(en)
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Improvements in Fare-indicators.
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GB190616715A
(en)
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Improvements in Pencil-cases.
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GB190616739A
(en)
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Improvements in Fare-indicators.
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GB190615324A
(en)
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Improvements in Stereo-telescopes.
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GB190616148A
(en)
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Improvements in Magazine Photographic Cameras.
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CA115289A
(en)
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Telephone exchange
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CA131997A
(en)
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Telephone exchange
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DK10395C
(en)
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Telephone exchange.
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ES37738A1
(en)
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A perfected carburetor device.
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DK8937C
(en)
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Connection device for Telephone system with Central battery.
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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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AT39863B
(en)
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Automatic block signaling device.
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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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AT43518B
(en)
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Circuit arrangement for automatic telephone exchanges.
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