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EP0092051A2
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Electroacoustic transducer with cylindrical housing
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EP0092045A2
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Electroacoustic transducer with support
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EP0074424A1
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Electroacoustic, in particular electrodynamic, transducer protected from moisture and dirt and in particular from iron particles
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DE3113076A1
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ELECTROACOUSTIC TRANSDUCERS EQUIPPED WITH DISPLAY AND / OR OPERATING DEVICES
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DE3113075A1
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ELECTROACOUSTIC TRANSFORMER WITH TUBULAR HOUSING
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DE3113042A1
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HEADSET TO BE WEARED ON A PROTECTIVE HELMET
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DE3014918A1
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HEADSET TO BE WEARED ON A PROTECTIVE HELMET
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DE2921434A1
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HEADSET FOR USE ON A PROTECTIVE HELMET
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DE2916286A1
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SWITCHGEAR
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DE2915990A1
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HIGHER FOR ATTACHING TO A PROTECTIVE HELMET
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DE2746075A1
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MICROPHONE ON A HELMET
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DE2704156A1
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Small loudspeaker for use outdoors - has slotted front cover with inclined slots preventing water ingress, and avoiding damage by freezing
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DE2704155A1
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Microphone mounted on helmet - has fixed plug into which pivoted coupling fits with microphone on flexible stem
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DE2523864A1
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Electroacoustical communication system for conference etc. - positions provided with microphone and loudspeaker units for simplex or duplex operation
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FR2269025A1
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Flexible support arm for microphones - consists of a bundle of thin rods closely packed together
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DE2429978A1
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Connecting element with soldering terminals - which are on an insulating board of which at least each two are connected by a conducting path
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CH559494A5
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Motor vehicle internal loudspeaker assembly - has U-shaped bracket for loudspeaker support allowing spacial adjustment by lateral nuts
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CH558120A
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Small loudspeaker - suitable for speech transmission
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CH452608A
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Electroacoustic converter
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GB1002983A
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Apparatus for two-way speech communication
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