Title:
Electric heater for stock watering tanks
United States Patent 2576688
Inventors:
Landgraf, Jacob T.
Publication Date:
11/27/1951
Assignee:
HUDSON MFG CO H D
Other Classes:
219/536, 392/501, 392/448, 219/526, 219/510, 219/541, 119/73, 219/523, 219/513
International Classes:
H05B3/80; H05B3/78