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DK6225C
(en)
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Receiver device for submarine sound transmission.
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FR329539A
(en)
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Telegraph transmitter
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DK5967C
(en)
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Receiver device for wireless Telegraphs.
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ES32494A1
(en)
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An automatic receiving and transmitting apparatus.
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CH28847A
(en)
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Telegraph transmitter
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FR339988A
(en)
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Telegraph transmitter
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DK10262C
(en)
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Device for Wireless Transmission of Sound Waves.
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DK7552C
(en)
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Devices of telegraph transmitter apparatus.
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DK6887C
(en)
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Devices in apparatus for transmitting sound signals through water.
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FR337271A
(en)
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Telephone transmitter
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FR346431A
(en)
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Telegraph transmitter
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CH32380A
(en)
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Telegraph transmitter
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FR336876A
(en)
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Signal transmission
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DK7826C
(en)
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Receiver for wireless signal transmission.
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DK6864C
(en)
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Device for Transmitting Movements.
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DK5811C
(en)
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Device for Clamping devices for double-wire transmission lines.
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FR341894A
(en)
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Telegraph signals
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FR332493A
(en)
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Force transmission device
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FR346841A
(en)
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Flexible transmission device
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FR359096A
(en)
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Transmitter for automatic telegraph systems
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FR361733A
(en)
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Mode of transmission of telegraph signals
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DK5935C
(en)
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Receiving device for electric waves.
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ES31422A1
(en)
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An insecticidal device.
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FR377422A
(en)
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Sound transmitting device
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DK5541C
(en)
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Device by Microphones.
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