Orthopedic mattress
United States Patent 2593678
US Patent References:
/0920256.html
- - 0920256

Invalid bed accessory
- - 2168649

Mattress supporting structure
- - 2225858


Inventors:
Roy, Johnson
Publication Date:
04/22/1952
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Assignee:
AMERICAN HOSPITAL SUPPLY CORP
Primary Class:
5/716
Other Classes:
5/728