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GB191314192A
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Nautical Instrument.
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GB191314191A
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New or Improved Equipment for Navigational Purposes.
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GB191311561A
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Improvements in or relating to Mariners' Compasses of the Projector Type.
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GB191311158A
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Improvements in and relating to Mariners' Compasses.
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GB191309732A
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Improvements in Loud Speaking Telephone Instruments.
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GB191221409A
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Improvements in Navigational Sounding Apparatus.
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GB191205964A
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Improvements in or relating to Sounding Tubes.
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GB191007260A
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Improvements in or relating to Controlling or Operating Devices.
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GB190822976A
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Improvements in Speed Indicators for Ships.
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GB190723570A
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An Improved Compass Suspension for use on Board Ship.
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GB190806898A
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Improved Means for Resetting the Pointers of Instruments.
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GB190806897A
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Improved Straight-line Motion applicable more especially for Recording Instruments.
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GB190712783A
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A Combined Level and Shadow Pin for use at Sea in connection with the Mariner's Compass.
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GB190710200A
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An Improvement in the Form of Bearings for Compass Bowls.
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GB190703566A
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Improvements in and connected with Azimuth Mirrors for Mariners' Compasses.
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GB190701397A
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Improvements in and connected with the Mariner's Compass.
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GB190626131A
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Improvements in Electrostatic Voltmeters.
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GB190626132A
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An Improvement in connection with Navigational Sounding Machines especially for Flying Soundings.
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GB190509514A
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An Improved Azimuth Mirror and Azimuth Circle.
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US809793A
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Electrostatic voltmeter.
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