CH29791A
(en )
1904-10-15
Hot water heating installation with forced circulation
FR348381A
(en )
1905-04-11
Hot water heating system with forced circulation
FR384716A
(en )
1908-04-18
Hot water heating with accelerated circulation
CH37203A
(en )
1907-05-15
Hot water heating installation
CH32664A
(en )
1905-08-31
Hot water central heating installation with heat recovery unit
CH23898A
(en )
1902-10-15
Hot water heating installation
FR367313A
(en )
1906-10-26
Rapid circulation hot water heating system
FR377718A
(en )
1907-09-13
Hot water heating with accelerated circulation
FR391207A
(en )
1908-10-26
Fast circulation hot water heating system
FR346090A
(en )
1904-12-31
Hot water heater
CH24075A
(en )
1902-11-15
Hot water heating installation
FR351200A
(en )
1905-07-05
Hot water heating system
FR344181A
(en )
1904-10-26
Hot water heating
FR6080E
(en )
1906-08-29
Hot water heating
FR382159A
(en )
1908-01-31
Steam or hot water heating
CH29671A
(en )
1904-09-15
Central heating installation with water circulation heated in a kitchen stove
FR330587A
(en )
1903-08-21
Hot water heating system
CH26096A
(en )
1903-07-31
Advanced hot water heating system
FR354322A
(en )
1905-10-03
Hot water heater
FR406305A
(en )
1910-01-27
Fast circulation hot water heating
FR352257A
(en )
1905-08-07
Hot water heating system
FR356003A
(en )
1905-11-18
Hot water heating system
FR394039A
(en )
1909-01-12
Hot water heating system, forced circulation
CH30842A
(en )
1905-01-31
Hot water heating
FR357703A
(en )
1906-01-10
Hot water heater