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US1507831A
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Concrete wall construction
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US1547390A
|
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Tie plate and rail fastening
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US1569977A
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Method of making concrete tiles
|
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US1498272A
|
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Concrete wall
|
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US1473627A
|
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Building block
|
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US1482187A
|
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Concrete-block-making plant
|
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US1590744A
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Concrete tile
|
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US1498271A
|
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Concrete block and wall
|
|
US1479298A
|
|
Form for concrete blocks and method of removing blocks therefrom
|
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US1425590A
|
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Apparatus for making concrete bricks
|
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US1406379A
|
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Saddle for reenforcing bars
|
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US1415554A
|
|
Floor construction
|
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US1408734A
|
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Building construction
|
|
US1437054A
|
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Apparatus for and method of making building blocks
|
|
US1408733A
|
|
Building block
|
|
US1412686A
|
|
Concrete block
|
|
US1406856A
|
|
Rolling apparatus for making building blocks
|
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CA179508A
|
|
Reversing valve
|
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US1222624A
|
|
Reversing-valve.
|
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US1203873A
|
|
Time-controlled apparatus.
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