| http://www.w3.org/ns/prov#value | - S5579124Feb 28, 1995Nov 26, 1996The Arbitron CompanyMethod and apparatus for encoding/decoding broadcast or recorded segments and monitoring audience exposure theretoUS5579479Oct 3, 1994Nov 26, 1996Plum Hall Inc.Computer software licensing authentication method and apparatusUS5581800Jun 7, 1995Dec 3, 1996The Arbitron CompanyMethod and apparatus for automatically identifying a program including a s
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