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US1084701A
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Means for removing coal and other foreign bodies from coal-bunker doors or other water-tight closures on ships.
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GB191201149A
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Improvements in or relating to Sluice Valves, applicable as Water-tight Doors.
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US1008978A
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Device for tightly closing and opening hinged doors on board ships from a distant point of operation.
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GB191008994A
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An Improved Device for Opening or Tightly Closing Hinged Doors on Ships from a Distant Point of Operation.
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GB191008554A
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Improved Means for Protecting Doors, Hatchways, and the like, in Ships.
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US1022688A
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Protective plates for bulkhead-openings and the like.
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GB190926023A
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Improvements in or relating to Compressed Air Operated Devices.
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US1029620A
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Door, hatch, or like closing device.
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GB190900847A
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Improvements in or relating to Doors, Hatches, or like Closing Devices.
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US989988A
|
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Hatch-opener.
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US938068A
|
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Door-operating mechanism.
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GB190726266A
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Improvements in or relating to Apparatus for Opening Closing and Locking Doors or the like
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