|
US1915939A
|
|
Conveyer chain
|
|
US1881899A
|
|
Selective unloader mechanism for elevators
|
|
US1901928A
|
|
Automatic spacer
|
|
US1881898A
|
|
Restaurant service conveyer system
|
|
US1903473A
|
|
Remote control conveyer switching system
|
|
US1903835A
|
|
Selective unloader mechanism for elevators
|
|
US1881896A
|
|
Conveyer roll
|
|
US1807834A
|
|
Pneumatic tube carrier
|
|
US1846449A
|
|
Control device for pneumatic dispatch tube apparatus
|
|
US1881895A
|
|
Conveyer switching system
|
|
US1834171A
|
|
Refuse chute
|
|
US1820674A
|
|
Safety shut-off device for conveyer systems
|
|
US1870583A
|
|
Selective unloader mechanism for elevators
|
|
US1763812A
|
|
Automatic safety control for conveyers
|
|
US1796119A
|
|
Tray elevator
|
|
US1766142A
|
|
Automatic transfer mechanism for conveyers
|
|
US1766141A
|
|
Refuse chute
|
