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DE938254C
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Device for displaying the charging zone for telephone and telex connections
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DE973402C
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Circuit arrangement for telecommunications, especially telephone systems with rotary dials, which are provided with locking points
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DE973072C
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Drive system for incrementally moving dialers controlled by impulses, especially for telecommunications systems
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DE972580C
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Constantly rotating dial
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DE972186C
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Stepper mechanisms for precision mechanical drives and selectors
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DE921163C
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Process for the production of copper plates coated with copper oxide
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DE971825C
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Circuit arrangement for small self-dialing private branch exchanges
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DE935314C
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Wire radio subscriber switch for optional connection to an overhead line or a cable line
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DE931714C
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Circuit for generating a ticker symbol
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DE921389C
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Switchable overlay receiver for AM / FM transmissions
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DE933659C
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Process for the production of porous, non-metallic sintered masses
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DE898586C
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Mixing arrangement for the chemical dissolution of foam-forming substances
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DE817478C
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Method for removing surface layers from metal wire pins
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DE887680C
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Method of manufacturing a dry rectifier
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DE802695C
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Carrier frequency two-wire system
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DE812268C
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Method for transmitting and receiving characters on telephone connections
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DE862471C
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Process for the recrystallization of metal disks for the production of dry rectifiers
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DE895039C
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Process for the manufacture of dry rectifiers
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DE868318C
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Process for the manufacture of dry rectifiers
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DE862636C
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Process for the manufacture of copper oxide rectifiers
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