US2056844A
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Transmission mechanism
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US2050941A
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Rule
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US2033026A
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Rule
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US2063423A
|
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Coilable measuring device
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US1994339A
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Rule
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US2063459A
|
|
Coilable measuring device
|
US2063422A
|
|
Coilable measuring device
|
US1939546A
|
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Means for controlling concavoconvex rules
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US1952979A
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Coiling means for concavo-convex rules
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US1799044A
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Means for controlling resilient rules
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US1799094A
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Means for controlling resilient rules
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US1906456A
|
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Means for controlling resilient rules
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US1820789A
|
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Coiling means for concavo-convex springs
|
US1828401A
|
|
Resilient rule
|