Perretta Graphics Corporation

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5992318 System for maintaining ink densityExpiredJul 16, 98Nov 30, 99[G01J, B41F]
5063845 Anti-wrap for high speed printing pressExpiredFeb 16, 90Nov 12, 91[B41F]
5025676 Screw adjustment mechanism with pre-set backlashExpiredJul 03, 89Jun 25, 91[F16H]

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