CH66069A
(en )
1914-10-01
Heating device for hot water heating with electrically heated heating resistors
CH68620A
(en )
1915-04-01
Liquid heater system with gas heating
CH69901A
(en )
1915-08-02
Electric hot water heating with heat storage
FR476666A
(en )
1915-08-24
Electric heating element
CH69941A
(en )
1915-08-02
Oven with electrically heated heating tubes
CH65875A
(en )
1914-10-16
Radiator with electrical heating resistance
CH63312A
(en )
1914-01-16
Cooking box with heating device
CH68142A
(en )
1915-02-16
Electric heating element
CH51607A
(en )
1911-09-16
Hot water boiler with indirect heating
CH75749A
(en )
1917-09-17
Hot water reservoir with electric liquid heater
CH79433A
(en )
1918-11-16
Hot water reservoir with electric liquid heater
CH64659A
(en )
1914-04-16
Electrically heated hot water bottle
FR480130A
(en )
1916-06-22
Electric heater
FR491691A
(en )
1919-06-12
Electric heating element
DK16917C
(en )
1913-01-27
Water heater with flat heating surfaces.
FR531469A
(en )
1922-01-14
electric heating element for radiators and heaters
CH60716A
(en )
1913-08-01
Electric water heater with water as a heating resistor
FR454190A
(en )
1913-06-27
electric heating element
FR470401A
(en )
1914-09-10
Electric heating
CH68785A
(en )
1915-05-01
Regulating device on gas heated liquid heaters
CH65887A
(en )
1914-07-16
Advanced electric heater
CH70246A
(en )
1915-09-01
Radiator element with device for heating the return water in hot water heating systems
FR460970A
(en )
1913-12-16
Heating device
FR529991A
(en )
1921-12-10
Radiator for hot water heating systems with electrically heated resistors
FR464636A
(en )
1914-03-26
Heating radiator