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Method and apparatus for recording a series of character tracks on the screen of a picture tube
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Method and apparatus for photographically recording traces formed on the screen of a cathode ray tube
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DE848266C
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Registration device
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GB677393A
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Paper feed mechanism for recording devices
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Esophageal switch for electrocardiograph apparatus
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Stylus for recorders
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Electrocardiograph with continuous record means
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Recorder with retractable websupporting means
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Sensitivity control for multichannel recording apparatus
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Feed mechanism for recording devices
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Multiple-lead electrocardiographs
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Multiple-lead electrocardiograph recorder
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Method of and means for recording phenomena by means of standing waves
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Polarized electromagnetic operator with damped coil armature
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Electrical recording instrument for electrocardiographs
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Method and means for recording phenomena by means of standing waves
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