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GB191226338A
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Improvements in and relating to Magnetic Compasses.
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GB191109067A
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Improvements in Navigational Sounding Machines.
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GB191109068A
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Improvements in or relating to Navigational Sounding Machines.
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|
GB191109069A
|
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Improvements in and relating to Navigational Sounding Machines.
|
|
GB191029414A
|
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Improved Suspension for Mariners' Compasses.
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|
GB191001157A
|
|
Improvements in Navigational Sounding Machines.
|
|
GB190915006A
|
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Improved Terminals for "Shunt" and other Electrical Apparatus.
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GB190821634A
|
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Improvements in Portable Magnetic Compasses.
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GB190820185A
|
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Improvements in Azimuth Instruments for use with Mariners Compasses
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GB190818510A
|
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Attachment for Mariners' Compasses.
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|
GB190818509A
|
|
Improvements in and relating to Mariners' Compasses.
|
|
GB190723833A
|
|
Improvements in Navigational Sounding Machines.
|
|
US928007A
|
|
Navigational sounding-machine.
|
|
GB190526759A
|
|
An Improved Apparatus for Adjusting the Compass at Sea without Sights.
|
|
GB190520813A
|
|
Improvements in and connected with Navigational Sounding Machines especially for Flying Soundings.
|
|
US864171A
|
|
Mariner's compass.
|
|
GB190422695A
|
|
Improvements in the Mariner's Compass.
|
|
GB190324526A
|
|
Improved Sounding Machine.
|
|
GB190308791A
|
|
Improvements in Electrostatic Voltmeters.
|
|
GB190304698A
|
|
Improvements in Electrical Measuring Instruments
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