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US2771630A
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Crab meat extractor
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US2771631A
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Apparatus for recovery of crab meat
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US2722617A
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Magnetic circuits and devices
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US2723549A
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Photo-flash bulb
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US2722663A
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High frequency inductance coil assembly
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US2591955A
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Circuit arrangement for the stabilization of alternating current voltages
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US2472256A
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Voltage stabilizer
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US2497605A
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Wave length modulating device
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US2473265A
|
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Audio-frequency amplifier
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US2504603A
|
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Resistance capacitance oscillator
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US2514267A
|
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Tone control and feedback circuits for audio frequency amplifiers
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US2503845A
|
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Circuits for the oeration of fluorescent lamps
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US2520419A
|
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Frequency-modulation demodulator
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US2499423A
|
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Telephone transmission circuits for coupling input and output devices to a telephone line
|
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US2489202A
|
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Calling and warning apparatus for communication systems
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US2513248A
|
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Radiographic apparatus
|
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US2547289A
|
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Oscillograph
|
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US2483189A
|
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Transmission line oscillator
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US2476349A
|
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Phase or frequency modulation system
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US2458805A
|
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Apparatus for measuring electrical resistance
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