Title:
Invalid support
Document Type and Number:
United States Patent 1448783

Inventors:
Anna, Blewitt Mary
Petterson, Edward W.
Publication Date:
03/20/1923
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Assignee:
Anna, Blewitt Mary
Petterson, Edward W.
Primary Class:
297/6
Other Classes:
482/68, 135/67, 297/5, 297/DIG.004
International Classes:
A61H3/04; A61H3/00




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