| http://www.w3.org/ns/prov#value | - r. 2010Parkervision, Inc.Applications of universal frequency translationUS772484528 mars 200625 mai 2010Parkervision, Inc.Method and system for down-converting and electromagnetic signal, and transforms for sameUS777368820 d???c. 200410 ao???t 2010Parkervision, Inc.Method, system, and apparatus for balanced frequency up-conversion, including circuitry to directly couple the outputs of multiple tra
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