|
US1909622A
|
|
Process for the propagation of culture germs for the inoculation of nitrogen gathering plants, such as legumes
|
|
US1618461A
|
|
Apparatus for propagation of culture germs
|
|
US1673291A
|
|
Service cabinet
|
|
US1222965A
|
|
Signaling mechanism.
|
|
US1222966A
|
|
Compartment-sealing mechanism.
|
|
US1222964A
|
|
Cabinet service-door.
|
|
US1222963A
|
|
Service-door.
|
|
US1071936A
|
|
Automatic vacuum-governor.
|
|
US1104060A
|
|
Vacuum cleaning apparatus.
|
|
CA129150A
|
|
Dust collector
|
|
CA128625A
|
|
Pneumatic cleaner
|
|
US1021203A
|
|
Closure for vacuum service-inlets.
|
|
US1094579A
|
|
Vacuum cleaning-tool.
|
|
US1020104A
|
|
Vacuum-sweeper.
|
|
US971390A
|
|
Dust-collector.
|
|
US1057253A
|
|
Squeegee.
|
|
US1035372A
|
|
Vacuum-sweeper.
|
|
US1007716A
|
|
Dust-collector.
|
|
CA108875A
|
|
Dust collector
|
|
CA110600A
|
|
Pneumatic brush
|
