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Caster raising and lowering mechanism
United States Patent 2042489
Inventors:
Williams, Owen J.
Publication Date:
06/02/1936
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Download PDF 2042489
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Assignee:
Williams, Owen J.
Primary Class:
280/43.140
Other Classes:
280/43.220, 16/33
International Classes:
B60B33/06
;
B60B33/04