Graphic Arts Technical Foundation

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6171734 Security printed document to prevent unauthorized copyingExpiredNov 02, 98Jan 09, 01[B42D]
6069601 Soft proofing displayExpiredOct 15, 97May 30, 00[G02F]
5999153 Soft proofing displayExpiredMar 22, 96Dec 07, 99[E06F]
5830609 Security printed document to prevent unauthorized copyingExpiredMay 10, 96Nov 03, 98[B42D]
5542352 Method and apparatus for cleaning stationary and moving printing press componentsExpiredOct 28, 94Aug 06, 96[B41M]
5311246 Frequency modulated acutance guide and method of useExpiredAug 26, 92May 10, 94[G03B]
4527333 Device for indicating a quantitative change in dot area of an image in a printing process and the method of making the sameExpiredJan 23, 84Jul 09, 85[G01B]

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