GB189611434A - Apparatus for Automatically Closing or Opening Doors and the like for Ships' Watertight Compartments, Buildings, Mines, and other purposes.
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Apparatus for Automatically Closing or Opening Doors and the like for Ships' Watertight Compartments, Buildings, Mines, and other purposes.
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Alexander Baron Von Der Ropp
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Individual
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Individual
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GB189611434D1896-05-261896-05-26Apparatus for Automatically Closing or Opening Doors and the like for Ships' Watertight Compartments, Buildings, Mines, and other purposes.
ExpiredGB189611434A
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