Mattress or cushion and spring unit therefor
United States Patent 1958798

Inventors:
Owen, David T.
Charles, Dietrich
Publication Date:
05/15/1934
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Assignee:
Owen, Automatic Spring Machiner
Primary Class:
5/267
Other Classes:
5/260, 5/721, 297/395, 5/270
International Classes:
A47C23/053; A47C23/00