Title:
Variable-pressure bed or mattress
United States Patent 1772310


Inventors:
Hart, Julian D.
Application Number:
US15522926A
Publication Date:
08/05/1930
Filing Date:
12/16/1926
Assignee:
Hart, Julian D.
Primary Class:
Other Classes:
5/615, 5/715, 5/933, 91/40, 92/48, 92/92, 601/148
International Classes:
A61G7/00
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