DK21683C
(en)
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Hollow Brick Making Machine.
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DK25315C
(en)
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Machine for the production of hollow glass objects.
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DK23204C
(en)
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Machine for Making Hulsten.
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DK31715C
(en)
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Hollow Glassware Manufacturing Machine.
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DK14948C
(en)
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Machine for the production of hollow glass objects.
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DK23554C
(en)
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Procedure for the production of hollow articles of pulp.
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DK31667C
(en)
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Machine for Manufacturing Hollow Glassware.
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CH77469A
(en)
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Hollow brick
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CH75314A
(en)
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Hollow brick
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CH75941A
(en)
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Facing brick
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FR485297A
(en)
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Hollow bricks
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DK20900C
(en)
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Machine for Manufacturing Insulators.
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ES62103A1
(en)
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A vitrifiable brick.
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DK26404C
(en)
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Machine for Manufacturing Bottles.
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DK23248C
(en)
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Formstone for the Construction of Hollow Walls.
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DK21368C
(en)
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Stamping machine for the production of cement pipes.
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DK24989C
(en)
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Apparatus for machines for making hollow bricks and the like.
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DK25224C
(en)
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Brick wall.
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DK15517C
(en)
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Cement Making Machine.
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ES65470A1
(en)
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Hollow brick.
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ES65559A2
(en)
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Hollow brick.
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CH74507A
(en)
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Hollow masonry
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DK29456C
(en)
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Cement Pipe Making Machine.
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DK31736C
(en)
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Glassware making machine.
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DK22349C
(en)
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Cement Roofing Machine.
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