US1808249A
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Wall construction
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US1821355A
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Ceiling, floor, and roof construction
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US1787453A
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Insulator and core
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US1679915A
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Ceiling construction
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US1679914A
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Floor and ceiling construction
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US1619749A
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Clamp
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US1564264A
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Concrete floor and ceiling construction
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US1538578A
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Concrete mold
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US1524147A
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Building block
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US1538577A
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Catch hinge for windows and the like
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US1588490A
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Pivot-window closure device
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US1524146A
|
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Wall construction for buildings
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US1497581A
|
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Building block
|
US1477072A
|
|
Building block
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US1399023A
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Building block or slab
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