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US1051543A
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Direction-finder for submarine signals.
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GB191209178A
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Improvements in and relating to Submarine Sound Direction Finders.
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GB191206815A
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Improved Method of Producing Sounds for Submarine Signalling and Apparatus therefor.
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US1080098A
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Submarine signaling.
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GB190703359A
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Improvements in Art of and Apparatus for Submarine Signaling
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GB190703358A
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Improvements in Methods of and Apparatus for Submarine Signaling
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GB190703360A
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Improvements relating to Submarine Signaling and to Liquid Resonators
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CA73889A
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Process of separating conductors from non-conductors
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GB190023878A
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Improvements in Process of and Mechanism for Separation of Conductors from Non-conductors.
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GB189418217A
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Improvements relating to the Tranmission of Telephonic Messages Between the Shore and a Lighthouse, Ship, or other Signal Station.
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CA50276A
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Submarine signalling system
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