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Noise canceling transmitter
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Handset hanger and switch
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Audio amplifier
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Noise canceling transmitter
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Communications headset mountable over the ear
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Communications headset with rotatable and tiltable electrical connector
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Communications headset with mounting means
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Reversible anti-noise microphone
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Communications headset with rotatable and tiltable electrical connector
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Telephone apparatus including electrical connector
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Communications headset with reversible mounting means
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Noise canceling transmitter
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Transducer drive rod
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Sintered transducer housing providing acoustical resistance and waterproofing
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Armature mounting assembly for an electroacoustic transducer
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Variable capacitor and electrical connector for use therewith
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Clamping means for an articlesupporting boom
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Clamping means for an articlesupporting boom
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Telephone handset hanger
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Headset
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