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Class Information
Number: 392/315
Name: Electric resistance heating devices > Heating devices (class 219 subclass 200) > Fluid-in-circuit type heater > Continuous flow of fluid being heated > With means to adjust current path between electrodes
Description: Subject matter including means to vary the effective length or cross-sectional area of the current flow between the electrodes.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6640048 |
Instant water heater |
Oct. 28, 2003 |
| 6250875 |
Heater |
Jun. 26, 2001 |
| 5636317 |
Electroheating apparatus and methods |
Jun. 3, 1997 |
| 5583960 |
Electroheating apparatus and methods |
Dec. 10, 1996 |
| 5033107 |
Electric sauna heater |
Jul. 16, 1991 |
| 4493973 |
Flow controlled electrode type liquid heater |
Jan. 15, 1985 |
| 4205222 |
Electrode type water heating boiler |
May. 27, 1980 |
| 4119833 |
Electric water heater |
Oct. 10, 1978 |
| 4029937 |
Control system for electrically conductive liquid heating apparatus |
Jun. 14, 1977 |
| 3978313 |
Power regulating arrangement for a three phase electrode-type water heater |
Aug. 31, 1976 |
| 3946197 |
Electrode water heating boiler |
Mar. 23, 1976 |
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