US1276158A
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Elevator-signal.
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US1164301A
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Threshold-illuminator.
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US1201356A
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Gearing for registers.
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US1090370A
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Door-controlling device.
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US1044115A
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Door-controlling device.
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US1112379A
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Elevator signal system or apparatus.
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US1174403A
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Door-operating mechanism.
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US1059078A
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Register for elevator-cars.
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US1059077A
|
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Elevator-car register.
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US1132607A
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Elevator signaling system.
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US1131855A
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Indicating device for annunciators and the like.
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US1089589A
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Electric indicator.
|
US999392A
|
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Valve mechanism.
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US1035802A
|
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Pneumatically-operated elevator signal system.
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US1020715A
|
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Lubricator for elevator-guides.
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US1109950A
|
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Signaling apparatus.
|
US1160315A
|
|
Elevator signaling apparatus.
|
US991973A
|
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Elevator signaling apparatus.
|
US1173192A
|
|
Elevator signaling apparatus.
|
US864915A
|
|
Elevator signaling apparatus.
|