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GB198963A
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Improvements in or relating to sockets for electric incandescent lamps
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GB203947A
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Improvements in electromagnetic apparatus for operating relay contacts, light signal mechanisms, and for similar purposes
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US1404428A
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Train-control system
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US1388917A
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System of speed control
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US1381698A
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System of train control
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US1421762A
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Train-control system
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US1333046A
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Light-signal
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US1421769A
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Three-position operating mechanism
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US1276384A
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Adjustable resistence unit.
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US1279638A
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Light-signal.
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US1333058A
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Alternating-current relay
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US1488469A
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Train-control system
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US1269917A
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Contact-finger.
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US1266346A
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Semaphore-blade grip.
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US1274602A
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System of distribution.
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US1279681A
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Interlocking relay.
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US1253194A
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Selector-relay.
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US1301949A
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Signal.
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US1293579A
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Automatic train or car stop system.
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US1274601A
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System of distribution.
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