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United States Patent 3543688

Inventors:
Malmberg, Goeran BO.
Publication Date:
12/01/1970
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Assignee:
Erik I I, Rockstrom
Beno, Grunwald J. B.
Primary Class:
104/296
Other Classes:
104/298, 104/303, 104/299, 40/463
International Classes:
A47F3/08; A47F3/00; B61B13/00




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