United States Patent 3232341
Inventors:
Woodworth, Lee R.
Publication Date:
02/01/1966
Other Classes:
165/175, 165/179, 165/DIG.202, 165/109.100, 165/146
International Classes:
F28B1/00; F28F13/12; F28F13/00
Foreign References:
| GB144413A | | | | |
| GB348358A | | | | |
| GB748562A | | | | |