US1163770A
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Laying or constructing concrete courses.
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US975457A
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Apparatus for filling trenches.
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GB190828505A
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Improvements in Apparatus for Laying Concrete Pavements and the like.
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GB190827223A
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Improvements in and relating to the Formation of Concrete Courses and similar Structures.
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US910578A
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Apparatus for laying concrete pipes.
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US910577A
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Method and apparatus for molding concrete pipes.
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US1042822A
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Apparatus for laying concrete courses.
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US868007A
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Means for molding pipes.
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US918699A
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Concrete building construction.
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CA100492A
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Conrete mixer
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US800942A
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Art of forming structures of concrete and similar materials.
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GB190410059A
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Improvements in Mixing Machines.
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GB190406537A
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Improvements in Concrete Mixing Machinery.
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CA86412A
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Mixing machine
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US761541A
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Mixing-machine.
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US814803A
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Concrete-mixing machinery.
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US782052A
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Mixing machinery.
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CA75976A
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Coupling metal bar for reinforced concrete
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GB190200177A
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Improvements in Concrete Floors and Walls.
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GB190200178A
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Improvements in Means for Coupling Metal Bars in Re-enforced Concrete Buildings and Structures.
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