DK53793C
(en )
1937-11-01
Traction regulator for hot water central heating boilers.
FR786183A
(en )
1935-08-28
Central heating boiler
DK53270C
(en )
1937-07-05
Hot water central heating system.
DK55558C
(en )
1938-12-12
Traction regulator for hot water heating systems.
DK47562C
(en )
1933-07-24
Hot water boiler for oil heating.
DK51480C
(en )
1936-04-06
Expansion tank for hot water central heating system.
DK52161C
(en )
1936-09-21
Water heater.
DK48927C
(en )
1934-06-25
Central heating boiler.
DK49268C
(en )
1934-09-17
Central heating boiler.
DK45771C
(en )
1932-06-06
Heater for electric water heaters.
FI18071A
(en )
1938-05-13
Central heating boiler
CH213589A
(en )
1941-02-28
Boiler for hot water heating with hot water preparation.
DK56287C
(en )
1939-06-12
Hot water boiler, preferably for Central heating systems.
FI14746A
(en )
1932-11-18
Steam boiler, for steam or central heating installations
DK49035C
(en )
1934-07-23
Combined Central Heating and Hot Water Supply Boiler.
ES137916A1
(en )
1935-08-16
Improvements introduced in the manufacture of boilers for heating by hot water.
DK51554C
(en )
1936-04-27
Steam boiler or Water heater.
DK50118C
(en )
1935-04-08
Electric Auxiliary heating device for Hot water supply system.
DK52670C
(en )
1937-02-08
Radiator for Central heating system.
DK48260C
(en )
1934-01-08
Central heating boiler.
DK54626C
(en )
1938-04-19
Hot water supply system.
DK51937C
(en )
1936-07-27
Elements for Central Heaters.
DK49957C
(en )
1935-03-04
Carrying device for hot water boilers for tiled stoves or other heating appliances.
DK52320C
(en )
1936-10-19
System for Heating Consumption Water.
DK53618C
(en )
1937-09-20
Water heater for Heating Consumption water.