Title:
IMMERSION HEATERS
United States Patent 3476915
US Patent References:
Electric heater for stock-watering tanks
- - 1334035
Waterproof connection for spark plug terminals and the like
- - 2690541
Spark plug nipple
- - 2904769
Miniature immersion heaters with watertight handles enclosing switching means
- - 2977456
Immersion heater assemblies
- - 3134888
Electric heater for stock-watering tanks
- - 1334035
Waterproof connection for spark plug terminals and the like
- - 2690541
Spark plug nipple
- - 2904769
Miniature immersion heaters with watertight handles enclosing switching means
- - 2977456
Immersion heater assemblies
- - 3134888
Inventors:
Rapsis, Michael J.
Publication Date:
11/04/1969
View Patent Images:
Export Citation:
Assignee:
Michael, Rapsis J.
Primary Class:
Other Classes:
439/936, 392/503, 338/274, 392/448, 219/541, 338/237, 174/77S
International Classes:
H05B3/78; H05B3/06; H05B3/02; H05B3/08
US Patent References:
| 3230492 | Electric heating elements |
Foreign References:
| CA554606A | ||||
| GB647178A | ||||
| GB969381A |