Spring-cushion structures and cushioning material therefor
United States Patent 3315283
Inventors:
Larsen, Ronald L.
Publication Date:
04/25/1967
Assignee:
WOOD CONVERSION CO
Other Classes:
264/DIG.081, 297/452.500, 5/721, 297/DIG.002
International Classes:
A47C27/04
US Patent References:
| 3133852 | Ventilating spacer and method | | | |