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GB129120A
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Improved Means for Detecting and Locating Sub-aqueous Sounds. Towing Hydrophones.
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GB131038A
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Improved Means for Detecting and Locating Subaqueous Sounds.
|
|
GB127864A
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Improved Means for Detecting and Locating Subaqueous Sounds.
|
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GB127296A
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Improved Means for Detecting and Locating Subaqueous Sounds.
|
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GB127054A
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Improved Means for Detecting and Locating Subaqueous Sounds.
|
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GB126691A
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Improved Means for Detecting and Locating Subaqueous Sounds.
|
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CA175742A
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Electrical relay
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GB125451A
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Improved Means for Detecting and Locating Subaqueous Sounds.
|
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GB191509344A
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Improved Means for Producing and Deflecting a Jet of Liquid.
|
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GB191412277A
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Improvements in Apparatus for Electric Signalling and for Controlling the Current in Electric Circuits especially applicable to Wireless Telegraphy.
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GB191407922A
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Improvements in Microphones, Relays and the like especially suitable for use in Radio-telephony.
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GB191329902A
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Improvements in the Generation of Electrical Oscillations.
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CA257386A
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Telephone transmitter and receiver
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US1150316A
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Electrical relay.
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