Kern & Co. AG.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5003187 Method and apparatus for surveying the surface of an object by projection of fringe patternsExpiredJan 17, 90Mar 26, 91[G01N]
4957375 Apparatus for guiding a shaftExpiredOct 10, 89Sep 18, 90[F16C]
4916324 Method and apparatus for electro-optical distance measurementExpiredSep 29, 88Apr 10, 90[G01N]
4872341 Sealing jointExpiredAug 17, 88Oct 10, 89[G01C, G12B, G01D, F16J]
4794251 Apparatus for measuring lengths or anglesExpiredNov 17, 87Dec 27, 88[H01J, G01D]
4759623 Electrooptical distance measuring apparatusExpiredJun 10, 86Jul 26, 88[G01C, H01S]
4681433 Method and apparatus for measuring relative positionExpiredFeb 02, 81Jul 21, 87[G01C, G01B]
4553836 Method and apparatus for electrooptical distance measurementExpiredAug 30, 82Nov 19, 85[G01C, G01S]
4537464 Infrared objective system lensExpiredJun 22, 83Aug 27, 85[G02B]
4482118 Adjusting base for geodetic instrumentsExpiredJun 02, 82Nov 13, 84[F16M]
4482219 High speed catadioptric objective lens systemExpiredOct 03, 80Nov 13, 84[G02B]
4352556 Reflector for electrooptical distance measurementExpiredMar 19, 80Oct 05, 82[G02B, G01C]
4274736 Method and apparatus for electrooptical distance measurementExpiredSep 26, 79Jun 23, 81[G01C]
4273425 High speed catadioptric objective lens systemExpiredDec 08, 78Jun 16, 81[G02B]
4259010 Apparatus for measuring and evaluating a picture plateExpiredDec 26, 78Mar 31, 81[G01C]

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