GTE Business Communication Systems

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Amplifier for use with telephone transmitter mounted in hand hel

Patent

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Belt holster for telephone instrument

Apparel and haberdashery – Footwear – Athletic-type
Patent

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Dual timing circuit for telephone subscriber's instrument

Patent

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High gain cascode amplifier with negative feedback

Amplifiers – Signal feedback – Combined with control of bias voltage of signal amplifier
Patent

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Modular loudspeaking telephone unit

Recording – communication – or information retrieval equipment – Computer – data processor equipment
Patent

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Profile ID: LFUS-PAI-P-237470

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