CH57444A
(en )
1913-01-02
Hot water heating system with circulation pump
DK15096C
(en )
1911-09-18
Hot water heating system with Pump operation.
AT57829B
(en )
1913-02-25
Hot water rapid circulation heating.
DK21104C
(en )
1916-03-20
Hot water heating system.
CH51607A
(en )
1911-09-16
Hot water boiler with indirect heating
CH73173A
(en )
1916-09-01
Hot water tank with electric heating
CH54087A
(en )
1912-04-16
One-pipe warning water heater with pump operation
CH70999A
(en )
1915-11-16
Hot water heating system
AT52280B
(en )
1912-02-26
One-pipe hot water heating with pump operation.
DK23495C
(en )
1918-09-09
Hot water heating system with heat collector.
FR447520A
(en )
1913-01-08
Fast circulating hot water level heating system
CH69446A
(en )
1915-07-01
Water heating system
DK21950C
(en )
1917-02-26
Hot water heater.
FR439616A
(en )
1912-06-19
Hot water heating system, rapid circulation
FR13975E
(en )
1911-08-18
Advanced hot water circulation heating system
FR425864A
(en )
1911-06-22
Advanced hot water circulation heating system
CH75749A
(en )
1917-09-17
Hot water reservoir with electric liquid heater
CH79433A
(en )
1918-11-16
Hot water reservoir with electric liquid heater
CH70251A
(en )
1915-09-01
Hot water supply system
CH78757A
(en )
1919-02-01
Hot water system
DK15620C
(en )
1912-02-19
Stove with water heating system.
CH69901A
(en )
1915-08-02
Electric hot water heating with heat storage
DK24619C
(en )
1919-06-10
Hot water heater for smaller rooms.
CH55164A
(en )
1912-07-16
Hot water radiator with electrical heat generator
AT75601B
(en )
1919-02-25
Water heater with hot and warm water boiler.