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DK8810C
(en)
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Device for Amplification of Telephone Streams.
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DK8222C
(en)
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Pipe Sealing Device.
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DK8757C
(en)
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Procedure for Making Solid Brillantine.
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DK8169C
(en)
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Device for Voice Devices.
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DK8418C
(en)
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Method of Making Silicon Monoxide.
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DK7259C
(en)
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Device by Telephone Systems.
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DK8606C
(en)
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Method of Making Compoboard.
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DK8387C
(en)
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Pipe Cleaning Device.
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DK7239C
(en)
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Central switching device for Telephone Systems.
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DK8494C
(en)
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Setting device for automatic Telephone Systems.
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DK7171C
(en)
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Telephone connection device.
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DK8906C
(en)
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Procedure for Manufacturing Matrices.
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DK10213C
(en)
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Transmitter for Telephony.
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DK11484C
(en)
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Device for the Production of Nitrogen Compounds of Carbides.
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FR367014A
(en)
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Telephone system
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FR384388A
(en)
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Telephone system
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FR364901A
(en)
|
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Telephone transmitter
|
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DK7238C
(en)
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Device for Telephone Connections.
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CH39532A
(en)
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Telephone system
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DK8261C
(en)
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Device by Microphones.
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DK8650C
(en)
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Device by Microphones.
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DK8915C
(en)
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Device by Microphones.
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FR5775E
(en)
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Phone enhancements
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CH37465A
(en)
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Lauter device
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DK10739C
(en)
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Telephone Dialing Device.
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