Cambridge Instruments Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5440674 Mesh generation with quasi-equilateral triangulation for finite element analysesExpiredJul 31, 91Aug 08, 95[G06T]
5115339 StereomicroscopeExpiredJul 03, 89May 19, 92[G02B]
D319874 Ophthalmic projectorExpiredSep 19, 88Sep 10, 91[]
D308879 Inverted microscopeExpiredFeb 20, 87Jun 26, 90[]
4893913 Steromicroscope having stabilizer for preventing tipping of eyepiece assembliesExpiredMar 23, 87Jan 16, 90[G02B]
D304592 Protective cover for a rotatable turret assembly and objectives of an inverted microscopeExpiredApr 09, 87Nov 14, 89[]
4770518 Apparatus for indicating intensity of an illuminator in an optical instrumentExpiredApr 08, 87Sep 13, 88[G09F, G02B, G01D]
4770520 Protective cover for turret assembly of an optical instrumentExpiredApr 08, 87Sep 13, 88[G02B]
D296904 MicroscopeExpiredOct 11, 85Jul 26, 88[]
4756610 Adjustable crank and linkage assembly for zoom lens optical systemExpiredApr 08, 87Jul 12, 88[G02B]
D296004 RefractometerExpiredNov 21, 85May 31, 88[]
D295556 Slit lamp for examining the structure of a patient's eyeExpiredMay 28, 85May 03, 88[]
D294860 Acuity chart projector or the likeExpiredSep 09, 85Mar 22, 88[]
4729646 Multi-use microscope having modular construction of extruded partsExpiredMay 15, 86Mar 08, 88[G02B, A47H]
4724526 Apparatus and method for determining object elevation and height from images thereofExpiredSep 11, 84Feb 09, 88[G01C, G06K]
D293818 Keratometer or the likeExpiredSep 30, 85Jan 19, 88[]
4715697 Microscope body systemExpiredDec 09, 85Dec 29, 87[G02B]
4712890 Apparatus for adjusting play in a precision optical instrumentExpiredSep 14, 84Dec 15, 87[G02B, F16C]
4710636 Reticle plate having a fluorescing patternExpiredAug 31, 84Dec 01, 87[F21K]
4704013 Auxiliary adjusting mechanism for optical instrumentsExpiredSep 14, 84Nov 03, 87[G02B, F16H]

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