US2579395A
|
|
Shutter mounting for ventilating duct outlets
|
US2619021A
|
|
Ventilator fan mounting
|
US2418760A
|
|
Pivotally mounted porthole blackout ventilator including a motordriven fan
|
US2311948A
|
|
Combination ventilator and drier
|
US2272928A
|
|
Shutter controlling device
|
US2165650A
|
|
Portable cooling fan
|
US2084392A
|
|
Air conditioning device
|
US1976401A
|
|
Air conditioning and filtering device
|
US1935179A
|
|
Ventilating appliance
|
US1915805A
|
|
Radiator
|
US1812124A
|
|
Portable ventilating outfit
|
US1917340A
|
|
Damping device for shutters
|
US1827512A
|
|
Cabinet air heater
|
US1956829A
|
|
Air volume regulator
|
US1907727A
|
|
Ventilator
|
US1779657A
|
|
Self-cooled electric motor
|
US1846057A
|
|
Air washer and humidifier
|
US1816920A
|
|
Self cooled electric motor
|
US1874043A
|
|
Unit for heating and ventilating systems
|
US1696982A
|
|
Air-circulating device
|