| http://www.w3.org/ns/prov#value | - 820 Dec 200410 Aug 2010Parkervision, Inc.Method, system, and apparatus for balanced frequency up-conversion, including circuitry to directly couple the outputs of multiple transistorsUS782240112 Oct 200426 Oct 2010Parkervision, Inc.Apparatus and method for down-converting electromagnetic signals by controlled charging and discharging of a capacitorUS782681720 Mar 20092 Nov 2010Parker Vision, Inc.A
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