AT75601B
(en )
1919-02-25
Water heater with hot and warm water boiler.
DK21950C
(en )
1917-02-26
Hot water heater.
ES58486A1
(en )
1914-08-01
Improvements in hot water heaters and stoves.
FR521103A
(en )
1921-07-07
Hot water and steam heating system
CH51607A
(en )
1911-09-16
Hot water boiler with indirect heating
DK23495C
(en )
1918-09-09
Hot water heating system with heat collector.
DK22271C
(en )
1917-07-16
Heater for Hot water and Steam heating.
CH70246A
(en )
1915-09-01
Radiator element with device for heating the return water in hot water heating systems
DK15620C
(en )
1912-02-19
Stove with water heating system.
DK18745C
(en )
1914-04-27
Hot water boiler.
ES61061A1
(en )
1915-11-16
A tubular boiler system with its own hearth for combined heating and cooking services and obtaining hot water with two independent hearths.
DK16917C
(en )
1913-01-27
Water heater with flat heating surfaces.
DK22900C
(en )
1918-03-18
Water heater with hot water tap and circulation line for gas appliances and the like.
DK18271C
(en )
1913-12-22
Hot water supply and Central heating systems.
CH57444A
(en )
1913-01-02
Hot water heating system with circulation pump
DK21104C
(en )
1916-03-20
Hot water heating system.
CH70879A
(en )
1915-11-01
Cooking stove with built-in hot water boiler for central heating
DK16088C
(en )
1912-06-17
Arrangement of the flues in steam or hot water element boilers.
CH67855A
(en )
1915-01-16
Steam hot water radiator
AT71565B
(en )
1916-04-25
Top cooker with built-in kettle for hot water heating.
DK21024C
(en )
1916-02-21
Easily separable boiler for hot water or steam heating systems and the like.
CH69141A
(en )
1915-07-01
Gas stove with hot water tank
DK19813C
(en )
1915-02-08
Double-adjustable Adjusting tap with double conical tap duty for steam and hot water heating pipes and the like.
CH73262A
(en )
1916-12-16
Hot water central heating, especially floor heating, with supply and return lines above the radiators
AT57829B
(en )
1913-02-25
Hot water rapid circulation heating.