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US1244937A
|
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Reinforced core for cement-block molds.
|
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US1170791A
|
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Method of making concrete blocks.
|
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US1218737A
|
|
Cement-block mold.
|
|
CA146759A
|
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Mould for cement blocks
|
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CA146916A
|
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Block making process
|
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US1086116A
|
|
Process for making blocks.
|
|
GB190709846A
|
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Improvements in the Process or Method of Making Moulded Building Blocks or Bricks.
|
|
CA107171A
|
|
Method of making moulded blocks
|
|
US862367A
|
|
Method of making molded blocks or bricks.
|
|
US857143A
|
|
Filling mechanism for brickmaking plants.
|
|
US976243A
|
|
Brick-ejecting mechanism.
|
