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US2573924A
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Audible electric signaling apparatus
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US2503286A
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Plug and receptacle construction
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US2484748A
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Selective electric signaling system
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US2463832A
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Door signal device
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US2503569A
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Electrical connecting device
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GB631250A
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Improvements in musical chime construction
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US2459603A
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Universal cable-clamping device
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US2459604A
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Universal cable-clamping device
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US2427015A
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Push-button switch construction
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US2475149A
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Plug and receptacle construction
|
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US2465111A
|
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Audible electric signaling apparatus
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US2442611A
|
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Audible electric signaling mechanism
|
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US2412978A
|
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Musical chime construction
|
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US2487767A
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Electrically actuated chime signal system
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US2418550A
|
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Method and apparatus for stacking and tying medical compresses or the like
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US2391231A
|
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Switch operating device
|
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US2360666A
|
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Electric signaling apparatus
|
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US2246890A
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Transformer construction
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US2249122A
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Multiple push button switch construction
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US2249001A
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Push button switch construction
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