United States Patent 2695773
Inventors:
Mcgrath, William L.
Publication Date:
11/30/1954
Other Classes:
261/DIG.011, 261/83, 239/251, 261/111
International Classes:
F28C1/02; F28F25/00; F28F25/08; F28C1/00
Foreign References:
| GB190825053A | | | | |
| GB465056A | | | | |
| GB496051A | | | | |