Marburg Technology, Inc.

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Patent Activity in the Last 10 Years

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6611401 Glide head with a transverse contact railExpiredNov 14, 00Aug 26, 03[G11B, G01B]
2003/0136,846 Optical memory card, method of manufacture, and driver for cardABANJan 22, 02Jul 24, 03[G06K]
6466371 Diffractive lens with gratings modified to offset effects caused by holding the lens at an angle with respect to a light sourceExpiredJan 27, 00Oct 15, 02[G02B]
6338269 Glide head with side mounted transducerExpiredMar 09, 00Jan 15, 02[G01B]
6330118 Dual focus lens with extended depth of focusExpiredApr 08, 99Dec 11, 01[G02B]
6267645 Level flying burnishing headExpiredMar 16, 00Jul 31, 01[B24B]
6233119 Shortened rail glide headExpiredAug 25, 99May 15, 01[G11B]
6216529 Glide head with tapered trailing endExpiredJun 15, 99Apr 17, 01[G01B]
6183349 Burnishing head with circular burnishing padsExpiredApr 28, 99Feb 06, 01[B24B]
6167016 Optical head with a diffractive lens for focusing a laser beamExpiredApr 11, 97Dec 26, 00[G11B]
6162590 Method for making an optical or magneto-optic head and the resulting headExpiredApr 13, 98Dec 19, 00[G11B]
6138502 Glide head for detecting defects on a disk surfaceExpiredJun 05, 98Oct 31, 00[G01B]
6033766 Gray scale mask and depth pattern transfer technique using inorganic chalcogenide glassExpiredJan 11, 99Mar 07, 00[G03F, B32B]
5998066 Gray scale mask and depth pattern transfer technique using inorganic chalcogenide glassExpiredMay 16, 97Dec 07, 99[G03F]
5980369 Level flying burnishing head with circular burnishing padsExpiredApr 14, 97Nov 09, 99[B24B]
5963396 Glide head with an outside active railExpiredApr 02, 97Oct 05, 99[G11B, G01B]
5782680 Burnishing head for polishing surfaces of carriers of magnetic mediaExpiredNov 13, 96Jul 21, 98[B24B]

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