Christensen; Larry B. - US Patent Attorneys and Agents

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Number of patents: 1
Last date: July 19, 1988

Number	Title	Issue Date
4759059	Analog telephone circuit for digital telephone system An interface circuit for interconnecting an analog telephone device with a digital telephone system includes an independent power supply (58) for driving the loop termination on an analog telephone device (22). An impedance matching circuit (54) and a sum...	07/19/1988