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United States Patent 2863675
US Patent References:
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Inventors:
Otto, Raymond L.
Publication Date:
12/09/1958
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Assignee:
Otto, Raymond L.
Primary Class:
211/53
Other Classes:
D19/92, 312/59, 221/59, 221/45, 312/61
International Classes:
B42D5/00; B64C13/24; G05D1/00; B64C13/00
US Patent References:
2108526Memorandum holder