|
US2520013A
|
|
Clutch mechanism
|
|
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|
|
Variable speed unit
|
|
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|
|
Machine for cutting sheet metal
|
|
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|
|
Back brace for machine tool rams
|
|
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|
|
Machine for bending sheet metal shapes
|
|
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|
|
Stud and rafter
|
|
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|
|
Structural member
|
|
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|
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Stud and rafter
|
|
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|
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Beam and the like for building construction
|
|
US2092472A
|
|
Stud and rafter
|
|
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|
|
Stud and rafter
|
|
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|
|
Beam and the like for building construction
|
|
US2049926A
|
|
Stud and rafter
|
|
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|
|
Frame for constructing building boards
|
|
US2055803A
|
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Power transmission device
|
|
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|
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Beam and the like for building construction
|
|
US2005301A
|
|
Metal frames for constructing building boards
|
|
US2049925A
|
|
Metal frame for constructing building boards
|
|
US2007284A
|
|
Bending machine for making metal tubes
|
|
US1971696A
|
|
Metal forming machine
|
