Optical Data Corporation

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5173051 Curriculum planning and publishing methodExpiredOct 15, 91Dec 22, 92[A47B, G09B]
5120230 Interactive method for the effective conveyance of information in the form of visual imagesExpiredJun 03, 91Jun 09, 92[G09B]

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