CH70246A
(en )
1915-09-01
Radiator element with device for heating the return water in hot water heating systems
AT75601B
(en )
1919-02-25
Water heater with hot and warm water boiler.
CH68620A
(en )
1915-04-01
Liquid heater system with gas heating
DK23997C
(en )
1919-01-27
Regulator for the Flow of Water in District Heating Systems with Hot Water.
FR521103A
(en )
1921-07-07
Hot water and steam heating system
DK16917C
(en )
1913-01-27
Water heater with flat heating surfaces.
CH73262A
(en )
1916-12-16
Hot water central heating, especially floor heating, with supply and return lines above the radiators
CH66069A
(en )
1914-10-01
Heating device for hot water heating with electrically heated heating resistors
DK18271C
(en )
1913-12-22
Hot water supply and Central heating systems.
DK23495C
(en )
1918-09-09
Hot water heating system with heat collector.
GB191318946A
(en )
1914-08-20
Improvements in or relating to Hot Water Heating Systems.
CH71780A
(en )
1916-02-16
Radiator arrangement for steam, hot water and mixed heating systems
DK21950C
(en )
1917-02-26
Hot water heater.
DK21104C
(en )
1916-03-20
Hot water heating system.
CH73961A
(en )
1917-05-16
Heat or cold transfer device
ES58486A1
(en )
1914-08-01
Improvements in hot water heaters and stoves.
CH70999A
(en )
1915-11-16
Hot water heating system
CH39342A
(en )
1908-02-17
Hot water element radiator with heating device
FR462988A
(en )
1914-02-11
Further training in hot water heating systems
FR529991A
(en )
1921-12-10
Radiator for hot water heating systems with electrically heated resistors
CH70251A
(en )
1915-09-01
Hot water supply system
ES71956A1
(en )
1920-03-16
Improvements in water heating devices and the like for domestic and other applications.
CH75749A
(en )
1917-09-17
Hot water reservoir with electric liquid heater
CH79433A
(en )
1918-11-16
Hot water reservoir with electric liquid heater
CH70396A
(en )
1915-09-16
Radiators for steam hot water heating systems