DK44395C
(en )
1931-07-27
Mixer for hot and cold air.
ES119856A1
(en )
1930-10-16
Improvements in cold rooms.
CA296515A
(en )
1930-01-14
Heating and cooling device for buildings
FR689641A
(en )
1930-09-09
Multiple ventilation apparatus for heating or refrigeration, reversible or not for premises, and the like
CA301046A
(en )
1930-06-10
Heating and ventilating apparatus
ES117832A1
(en )
1930-07-01
Improvements in the heating and cooling of buildings.
CA299048A
(en )
1930-04-08
Hot air register
DK47400C
(en )
1933-06-06
In the cold state formal art mass and method of its manufacture.
ES126146A1
(en )
1932-08-01
New procedure and apparatus to get cold.
CA302377A
(en )
1930-07-22
Combined heating and cooling apparatus
FR702777A
(en )
1931-04-16
heat exchanger
FR622090A
(en )
1927-05-23
Wine heater and cooler
CA290477A
(en )
1929-06-18
Heating and cooling device
ES119740A2
(en )
1930-12-01
Isothermal roof for cars and its maneuvering device.
CA297578A
(en )
1930-02-18
Heating and ventilating system
ES121126A1
(en )
1931-01-16
Improvements in heaters for gaseous fluids.
ES119215A1
(en )
1930-11-01
Procedure and device for the fermentation of sugary liquids.
CA307058A
(en )
1930-12-30
System for cooling and heating buildings
DK43798C
(en )
1931-03-09
Air purifier.
ES117831A1
(en )
1930-07-01
Improvements in the heating or cooling of buildings.
DK45812C
(en )
1932-06-13
Heat transfer device.
GR2888B
(en )
1930-08-19
MATERIALS AND AIR MAKING SYSTEM ARE MADE.
ES118741A1
(en )
1930-07-16
Improvements in continuous furnaces.
CA299632A
(en )
1930-04-29
Heat-exchange device
CA302659A
(en )
1930-08-05
Exhaust ventilator