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of interest, bit older patent upgrade http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=/netahtml/PTO/search-adv.html&r=8&p=1&f=G&l=50&d=PG01&S1=(ign.BIS.+AND+adc)&OS=spec/ign+and+adc&RS=(SPEC/ign+AND+adc) |
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