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Date: 2015-05-26 20:08:10Politics Voting Electoral systems Political philosophy Electronic voting Elections Punchscan Ballot Electoral fraud Voting system Scantegrity Vote counting | US 20140172517A1United States (12) Patent Application Publication (10) Pub. No.: USA1 Chaum (54)Add to Reading ListSource URL: www.chaum.comDownload Document from Source WebsiteFile Size: 640,98 KBShare Document on Facebook |