Philips and Du Pont Optical Company

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5623472 Method and apparatus for recording signals on a record carrier, measurement method and measurement device for use in the recording method and the recording apparatus, and record carrierExpiredMar 02, 94Apr 22, 97[G11B]
5269409 Package for at least one disc provided with a central center holeExpiredSep 28, 90Dec 14, 93[B65D]
5188863 Direct effect master/stamper for optical recordingExpiredDec 18, 90Feb 23, 93[B05D]
5176859 Apparatus/and method for controlling an injection molding process producing a molded partExpiredDec 02, 91Jan 05, 93[B29C]
5150113 Method and apparatus for transmitting an information signal together with data packets of related and unrelated textual information and receiving apparatus thereforExpiredMar 26, 90Sep 22, 92[H04B]
5150353 Apparatus for scanning a disc, and suction device for holding a disc flat during scanningExpiredSep 11, 91Sep 22, 92[G11B]
5146438 Method of making double-sided magneto-optical disks having reduced birefringenceExpiredMay 30, 90Sep 08, 92[G11B]
5133824 Method and device for removing a flexible product from a carrier plateExpiredDec 07, 90Jul 28, 92[B32B]
5101971 Storage cassette for a disc having a center holeExpiredAug 17, 90Apr 07, 92[B65D]
5006217 Arrangement for contacting and holding a moldExpiredJul 21, 89Apr 09, 91[C25D]
4996078 Method of removing particles from substrate surfacesExpiredJan 26, 90Feb 26, 91[B05D]
4916567 Storage cassette for a disc-shaped information carrierExpiredJul 26, 88Apr 10, 90[G11B]
4861437 Method of manfacturing a mould and providing it with a backing and mould manufactured according to the inventionExpiredJul 21, 88Aug 29, 89[C25D]
4856766 Vacuum apparatus for holding workpiecesExpiredMar 14, 88Aug 15, 89[B25B]
4852327 Machine for assembling a containerExpiredDec 16, 87Aug 01, 89[B65B]
4834843 Method of marking disc-shaped information carriersExpiredFeb 01, 88May 30, 89[C25D]

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