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DE736479C
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Device for displaying the electrical axis of the heart
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DE693778C
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Device for electrical influencing of the cardiac activity in the living organism
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DE674106C
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Arrangement for recording electrocardiograms
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DE691716C
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Directional beam transmission tubes for ultrashort waves
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DE683755C
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Device for automatic stabilization when registering volume changes of organs inside the body by means of ultra-short electrical waves
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DE658366C
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Measuring device for examining the movements of organs inside the human body
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DE676662C
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Device for recording the voltages or currents of a three-phase system for electrocardiography
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DE664072C
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Electrocardiograph for the simultaneous recording of the leads of the three extremities
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DE666512C
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Device to make interference fields ineffective in electrocardiography with amplifiers
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DE662214C
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Device for the self-control of unmanned aircraft
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DE666209C
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Device for recording the three action voltages of the heart with a cathode ray tube
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DE620175C
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Cascade amplifier
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DE570483C
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Braun tube
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DE687131C
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Arrangement for adapting one or more emitters coupled to a parallel conductor system
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DE616600C
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Transmitter for short electric waves
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DE634873C
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Shortwave circuit
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DE688530C
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Brake field circuit for amplifying or rectifying vibrations
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DE668499C
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Brake field circuit for amplifying or rectifying vibrations
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DE661373C
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Receiver for very short waves
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DE611148C
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Receiving amplifier circuit for very short waves
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