United States Patent 3205891
Inventors:
Martin, Achner
Publication Date:
09/14/1965
Other Classes:
52/63, 4/524, D25/16, 428/188
International Classes:
A61H33/06
US Patent References:
| 2855636 | Edge dovetail insulated wall construction | | | |
Foreign References:
| GB607213A | | | | |
| FR1040141A | | | | |
| DE825306C | | | | |