| http://www.w3.org/ns/prov#value | - sonant cavity principlesUS5241279 *27 Mar 199231 Ago 1993Alcatel N.V.Microwave measuring apparatus for continuously and without contact measuring the thickness of a thin conducting layer of a running insulating support such as a fiber or a tapeUS5349852 *15 Nov 199127 Sep 1994Deka Products Limited PartnershipPump controller using acoustic spectral analysisUS5526844 *18 May 199518 Jun 1996Deka Prod
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