McGraw-Hill, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4868866 Broadcast data distribution systemExpiredFeb 18, 88Sep 19, 89[H04K]
4842402 Projection and viewing apparatusExpiredApr 30, 86Jun 27, 89[G03B]
4601572 Microfilming system with zone controlled adaptive lightingExpiredApr 09, 85Jul 22, 86[G03B]
4349163 Coreless roll film structure and apparatus for winding thereofExpiredOct 31, 80Sep 14, 82[B65H]
D261368 Drawing instrumentExpiredDec 03, 79Oct 20, 81[D100]

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