Time domain radio transmission system
Patent 4979186 Issued on December 18, 1990. Estimated Expiration Date: 
March 13, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 13, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3728632 3806795 Quantized pulse modulated nonsynchronous clipped speech multi-channel coded communication system Delay-modulated random energy intelligence communication system Pulse modulator using capacitor charging and discharging circuits Spread spectrum radio transmission system Time domain radio transmission system Patent #: 4813057 InventorAssigneeApplicationNo. 322538 filed on 03/13/1989US Classes:375/239, PULSE POSITION, FREQUENCY, OR SPACING MODULATION375/259SYSTEMS USING ALTERNATING OR PULSATING CURRENTExaminersPrimary: Olms, Douglas W.Assistant: Chin, Stephen Attorney, Agent or FirmInternational ClassesH04B 015/00H04K 001/00 AbstractA time domain communications system wherein time modulated, impulse derived signals are multiplied by a template signal, integrated, and then demodulated. By this process, usable signals are obtained which would be otherwise obscured by noise.Other References
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