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HU896673D0
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Apparatus for developing human ability
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HUT55926A
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Circuit arrangement for continuous regulating sensitivity of microphone amplifiers used in studio engineering
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HUT51049A
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Low-frequency generator
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HUT49223A
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Multistation communication data collecting and indicating system
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HUT51069A
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Headphone with sound intensity control
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HUT49019A
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Circuit arrangement for increasing blocking damping of studiotechnic profile regulator
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HUT47760A
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Desk-top microphone frame
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DE3716369A1
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Flow measuring device for flowing media
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HUT46817A
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Assisting apparatus to conversation exercise mainly for individula studying foreign languages
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HUT46821A
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Handling device for adjusting elements with rotating shaft
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HUT46483A
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Circuit arrangement for realizing voice frequency output stage for driving line without transformer
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HUT51024A
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Slef-carrying, uniform stable push-button assembly for push button switches
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HUT42890A
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Clamping structure for fixing microphone-cartridges
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HUT40529A
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Loudspeaker, favourably sound column or horn loudspeaker
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HUT43369A
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Shuttered door and window structure
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HUT39235A
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Swinging clamp for quick fastening snouts of adjustable length
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HUT37311A
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Wire interpreter apparatus with electronic chooser of langauge
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SU1386051A3
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Automatic intercommunication system
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DD222714A5
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Programmable training instrument for persons suffering under language errors
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HUT35991A
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Die for simultaneous fine shearing internal and external outlines
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