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US2243349A
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System of elevator control
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US2004060A
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Residence elevator
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US2025566A
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Elevator gate
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US2019917A
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Elevator leveling control
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US1838524A
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Safety device for elevators
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US1929391A
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Elevator controller
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US1849788A
|
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Elevator platform
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US1637025A
|
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Brake mechanism
|
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US1598583A
|
|
Slide-door-operating device
|
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US1557857A
|
|
Safety locking apparatus for elevators
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US1615767A
|
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Electrical brake
|
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US1549736A
|
|
Governor for elevators and the like
|
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US1615019A
|
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Motor controller
|
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US1472386A
|
|
Cable equalizer
|
|
US1492079A
|
|
Motor controller
|
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US1509803A
|
|
Counterbalance for elevators
|
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US1400254A
|
|
Elevator-oiling mechanism
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US1291195A
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Elevator-governor.
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US1236115A
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Cable-clamp.
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US1267626A
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Dash-pot buffer.
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