|
GB1005142A
|
|
An improved magnetic tape recorder
|
|
US3080101A
|
|
Magazine loading magnetic tape recorder-reproducers
|
|
US2373916A
|
|
Dust flow indicator for suction cleaning devices
|
|
US2373915A
|
|
Sweeping indicator for dust suction pipes
|
|
US2325633A
|
|
Indicator for suction cleaning systems
|
|
US2349832A
|
|
Spectacular dust indicator for airway sanitary cleaning systems
|
|
US2353621A
|
|
Dust indicator for air-method cleaning systems
|
|
US2351068A
|
|
Dust indicator for air-method cleaning systems
|
|
US2354089A
|
|
Dust arresting indicator for suction cleaners
|
|
US2293920A
|
|
Detecting indicator for air-method cleaning systems
|
|
US2335885A
|
|
Demonstrating indicator for airmethod cleaners
|
|
US2269483A
|
|
Dust flow indicator for suction cleaning devices
|
|
US2269482A
|
|
Suction cleaner
|
|
US2210953A
|
|
Suction cleaner
|
|
US2123914A
|
|
Pneumatic cleaner
|
|
US2175647A
|
|
Air-method cleaner antechamber type
|
|
US2190679A
|
|
Sweeper floor tool
|
|
US2175646A
|
|
Floor tool roller
|
|
US2190678A
|
|
Air-method cleaner, antechamber type
|
|
US2175645A
|
|
Air-method cleaner antechamber type
|
