CH81083A
(en )
1919-10-16
Device for utilizing the heat of the exhaust gases flowing through the exhaust pipe of furnaces
CH80187A
(en )
1919-02-17
Device for utilizing the heat of the exhausting furnace gases
CH80067A
(en )
1919-02-01
Device for utilizing the heating power of flue gases
CH81410A
(en )
1919-11-01
Device for utilizing the exhaust gas heat from combustion systems
CH80190A
(en )
1919-02-17
Equipment in chimneys to utilize the heat from the same exhaust gases
CH76653A
(en )
1918-01-16
Device for utilizing the heat of the exhaust gases from heating ovens and cookers
CH78853A
(en )
1918-09-02
Equipment in gas pipes for better mixing of the gas with the combustion air
CH79445A
(en )
1919-04-16
Device for heat storage for cookers and ovens
AT87511B
(en )
1922-03-10
Reversing device for the flue gases of a heating furnace and for similar purposes.
FR488465A
(en )
1918-10-15
Heat recovery unit for air or gas
FR497362A
(en )
1919-12-04
Gas purifier
CH79608A
(en )
1919-04-16
Gas bath heater
FR510737A
(en )
1920-12-09
Gas heating device
CH77775A
(en )
1918-05-16
Device for heating, cooking, etc. that can be attached to flue pipes for hot gases
CH51771A
(en )
1911-09-16
Device for utilizing the heat of combustion gases
CH75225A
(en )
1917-06-16
Device for cooking stoves to make better use of the heat
FR523087A
(en )
1921-08-11
Advanced gas heater
FR504443A
(en )
1920-07-05
Gas device for heating the air
FR519574A
(en )
1921-06-11
Gas heater
FR23752E
(en )
1921-12-30
Gas heater
CH78637A
(en )
1919-01-16
Device for humidifying, cleaning, cooling or heating air and gases
DK29604C
(en )
1922-05-15
Gas oven or Heater.
FR503692A
(en )
1920-06-16
Gas heater
FR510593A
(en )
1920-12-07
Gas heater
FR508038A
(en )
1920-09-29
Gas heater