Ernst Leitz Wetzlar GmbH

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5025147 Sensor for converting a distance to optical and further to electrical energy, and surface scanning apparatus using sameExpiredSep 22, 88Jun 18, 91[H01J]
4946266 Universal object holder for microscopesExpiredSep 16, 88Aug 07, 90[G02B]
4889548 Use of an oxide ceramic material for compression molds for shaping elements made from glass or a glass-containing ceramic and having high surface quality and dimensional accuracyExpiredJan 06, 88Dec 26, 89[C03B]
4881802 Combined bright field-dark field incident light illumination apparatusExpiredMay 03, 88Nov 21, 89[G02B]
4881897 Tooth-root implant with long-term resistance to repetitive stressesExpiredJan 07, 88Nov 21, 89[A61C]
4871290 Automatic handling apparatus for plate-shaped objectsExpiredMay 16, 88Oct 03, 89[H01L]
4868128 Process for dry dispersal of particles, and a device for carrying out this processExpiredAug 20, 87Sep 19, 89[G01N]
4859896 Piezoelectric precision positioning deviceExpiredMar 04, 88Aug 22, 89[H01L]
4837595 Process and device for photographing microscopic objectsExpiredMar 09, 88Jun 06, 89[G03B]
4830655 High temperature-resistant material for devices used for forming glass optical elements with high surface qualityExpiredJun 09, 87May 16, 89[C03B]
4816664 Focusing detector having a scanning grating used both as a beam splitter and spatial and frequency filterExpiredOct 22, 86Mar 28, 89[G01J]
4814814 Process and device for the introduction, visualization and/or recording of a variable metering spot into a ray path of a camera for optical instrumentsExpiredJun 01, 88Mar 21, 89[G03B]
4798948 Field stop for dark field illumination in autofocus optical deviceExpiredApr 17, 87Jan 17, 89[G01J]
4796999 Device for automatically determining the deviation between the structures of a pattern and those of an object compared therewithExpiredJan 16, 87Jan 10, 89[G01B]
4786934 Photographic camera having an interchangeable lensExpiredOct 30, 87Nov 22, 88[G03B]
4779241 Acoustic lens arrangementExpiredJun 24, 86Oct 18, 88[G01S]
4758731 Method and arrangement for aligning, examining and/or measuring two-dimensional objectsExpiredJan 12, 87Jul 19, 88[G03B, G03F]
4753525 Modular deviceExpiredFeb 26, 87Jun 28, 88[G02B]
4738033 Rapid change holder for probe pinsExpiredJul 10, 86Apr 19, 88[B23Q]
4738512 Cylindrical mounting with clearance-free fitExpiredSep 04, 86Apr 19, 88[G02B, G03B]

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