| Patents for G01N 21 - Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible, or ultra-violet light (181,396) |
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| 09/24/1991 | US5051162 Fluorescence detection type electrophoresis apparatus and its supporting vessel |
| 09/24/1991 | US5050992 Dispersive holographic spectrometer |
| 09/24/1991 | US5050991 High optical density measuring spectrometer |
| 09/24/1991 | CA1289443C Test aids and method for the preparation thereof |
| 09/23/1991 | EP0533653A4 Method for detecting the presence of contaminants in a reusable plastic food or beverage container. |
| 09/20/1991 | CA2038108A1 Fiberoptic interferometric sensor |
| 09/19/1991 | WO1991014176A1 Method and apparatus for the transmission of an acoustic signal in a photoacoustic cell |
| 09/19/1991 | WO1991014173A2 Web inspection system |
| 09/19/1991 | WO1991014171A1 Turbidity measurement |
| 09/19/1991 | WO1991014170A1 Process for determining the condition of a road surface |
| 09/19/1991 | WO1991014169A1 Electro-optical methods and apparatus for high speed, multivariate measurement of individual entities in fiber or other samples |
| 09/19/1991 | WO1991014159A1 A method of reflection measurement |
| 09/19/1991 | WO1991013897A1 Multichromophore fluorescent probes |
| 09/19/1991 | WO1991011695A3 Measurement of deformation |
| 09/19/1991 | DE4008280A1 Indicating ice etc. on road surface - using IR detector and halogen lamp source with beam modulator and narrow bandpass filter |
| 09/19/1991 | CA2078114A1 Web inspection system |
| 09/18/1991 | EP0447174A2 High speed vapor detection with low temperature bypass |
| 09/18/1991 | EP0446859A1 Chemical luminescence-detecting apparatus |
| 09/18/1991 | EP0446858A1 Calibrating method of enzyme immuno assay system |
| 09/18/1991 | EP0446838A2 Method of and apparatus for inspection of bonding wire |
| 09/18/1991 | EP0446808A2 Method and apparatus for measuring the colour of fibre slivers |
| 09/18/1991 | EP0446794A1 Method for in-situ monitoring of superficial humidity of moving coffee beans |
| 09/18/1991 | EP0446245A1 Electrochemiluminescent assays |
| 09/18/1991 | CN1013929B Fiber optic detector for flotation cell processing |
| 09/17/1991 | WO1991014172A1 Colorimetric processes for determining and adjusting the peracid content of a solution in the presence of hydrogen peroxide |
| 09/17/1991 | US5049742 Apparatus for detecting deterioration of engine oil |
| 09/17/1991 | US5049738 Laser-enhanced oil correlation system |
| 09/17/1991 | US5049736 Apparatus for measurement of geological age by measuring zirconium color |
| 09/17/1991 | US5049508 Apparatus and process for total sulfur determination |
| 09/17/1991 | US5049487 Glucose levels in blood |
| 09/17/1991 | US5049359 Apparatus for biochemical analysis |
| 09/17/1991 | US5048970 Optical attachment for variable angle reflection spectroscopy |
| 09/17/1991 | US5048965 Three-dimensional imaging technique with occlusion avoidance |
| 09/17/1991 | US5048960 Microspectroscope |
| 09/17/1991 | US5048957 Speciman rack with insertable cuvettes |
| 09/17/1991 | US5048952 Liquid mixing ratio sensor |
| 09/17/1991 | CA2058292A1 Colorimetric process for measuring and controlling the peracid content of a solution in the presence of hydrogen peroxide |
| 09/17/1991 | CA1289219C Temperature compensated moisture sensor |
| 09/12/1991 | DE4006790A1 Stimulation spectral width reduction for charged gas particles - uses stimulation of gas particles by laser within short time intervals with max. voltage applied to ion trap |
| 09/11/1991 | EP0446080A1 Method and device for elemental analysis of a sample by mass spectrometry coupled to a high frequency induced plasma |
| 09/11/1991 | EP0446028A2 Method and apparatus for improving the signal to noise ratio of an image formed of an object hidden or behind a semi-opaque random media |
| 09/11/1991 | EP0445621A2 Method and agent for the colorimetric determination of nitrate ions |
| 09/11/1991 | EP0445520A1 Method for examining the physical properties of thin layers |
| 09/11/1991 | EP0445477A2 Method and device for detecting bubbles in a liquid |
| 09/11/1991 | EP0445412A1 Naphthotriazolium salts |
| 09/11/1991 | EP0445293A1 Light receiving system of heterodyne detection and image forming device for light transmission image using said light receiving system |
| 09/11/1991 | EP0445210A1 Method and apparatus for identifying causes of repeatability problems in near infrared analytical instruments. |
| 09/11/1991 | EP0377571B1 Imaging process and system for transillumination with photon frequency marking |
| 09/11/1991 | EP0341305A4 Modular fiber optic chemical sensor |
| 09/11/1991 | CN2084618U Atmotizing device |
| 09/11/1991 | CN2084617U Seman effect mercury measuring instrument in alternative longitudinal magnetic field |
| 09/11/1991 | CN1054487A In-line measurer of oxygen dissolved in geothermic water |
| 09/11/1991 | CN1054486A Oil radiation spectrum analyzer with microwave plasma |
| 09/11/1991 | CN1013899B Orientation for crystal face of natural diamond |
| 09/10/1991 | US5048093 Defect counting method and apparatus |
| 09/10/1991 | US5047851 Process and device for detecting and evaluating surface cracks in workpieces |
| 09/10/1991 | US5047846 Image processing equipment with light source synchronized to blanking interval of video camera |
| 09/10/1991 | US5047652 System for on-line measurement of color, opacity and reflectance of a translucent moving web |
| 09/10/1991 | US5047640 Web inspecting method |
| 09/10/1991 | US5047639 Concentration detector |
| 09/10/1991 | US5047627 Configuration fiber-optic blood gas sensor bundle and method of making |
| 09/10/1991 | US5047626 Optical fiber sensor for measuring physical properties of liquids |
| 09/10/1991 | US5047563 Chiral crown ethers |
| 09/10/1991 | US5047444 Fluorescent degree of cure monitors |
| 09/10/1991 | US5047351 Optical end-point type analytical method |
| 09/10/1991 | US5047350 Silicic acid heteropolycondensate membrane containing luminescent material |
| 09/10/1991 | US5047213 Biological sensors |
| 09/10/1991 | US5047208 Colorimetric analysis; optical fibers |
| 09/10/1991 | US5047100 Curcumin in the detection and warning of cyanide adulterated food products |
| 09/10/1991 | US5046854 Photometric cell and probe having windows fusion sealed to a metallic body |
| 09/10/1991 | US5046847 Method for detecting foreign matter and device for realizing same |
| 09/10/1991 | US5046846 Method and apparatus for spectroscopic comparison of compositions |
| 09/10/1991 | US5046842 Mixing ratio detecting device for composite liquid |
| 09/10/1991 | CA1288766C Reducible compounds and analytical compositions, elements and methods utilizing same |
| 09/10/1991 | CA1288689C Scattered total internal reflectance immunoassay system |
| 09/10/1991 | CA1288611C Chromatographic optical detector |
| 09/09/1991 | WO1991014127A1 Apparatus for inspecting the interior of a lateral pipeline |
| 09/09/1991 | CA2075709A1 Apparatus for inspecting the interior of a lateral pipeline |
| 09/08/1991 | CA2036893A1 Naphthotriazolium salts |
| 09/06/1991 | WO1991014157A2 Acousto-optic tunable double-beam spectrometer |
| 09/06/1991 | CA2037552A1 System and method for measurements in paper production |
| 09/05/1991 | WO1991013343A1 Flaw annunciator for an automatic inspection system |
| 09/05/1991 | WO1991013342A1 Scanner detector |
| 09/05/1991 | WO1991013341A1 Scanning apparatus |
| 09/05/1991 | WO1991013340A1 A method of measuring slurry |
| 09/05/1991 | WO1991013339A1 Sample cell for use in chemical or biochemical assays |
| 09/05/1991 | WO1991013325A1 An ''in-line'' spectral reference method for spectrometers |
| 09/05/1991 | DE4006420A1 Optical detector for foreign bodies or coatings on transparent plate - has transceiver intermediate foil with highly transparent regions only in light path input and output areas with adhesive to prevent peeling |
| 09/04/1991 | EP0445049A2 Colorimetric method for continuous monitoring of impurities on aluminium hydroxide |
| 09/04/1991 | EP0444946A2 A method for quantitatively measuring saturates, olefins and aromatics in a composition |
| 09/04/1991 | EP0444689A2 A compensation method adapted for use in color measuring apparatus |
| 09/04/1991 | EP0444675A2 Method and apparatus for determining the quality properties of individual pieces of meat |
| 09/04/1991 | EP0444520A2 Sensor arrangement |
| 09/04/1991 | EP0444235A1 Device for measuring the turbidity of smoke and preferred application |
| 09/04/1991 | EP0444136A1 Coded cuvette for use in testing apparatus. |
| 09/04/1991 | EP0357668B1 Process and device for determining the soot content of flue gases |
| 09/03/1991 | US5046113 Method of and apparatus for detecting pattern defects by means of a plurality of inspecting units each operating in accordance with a respective inspecting principle |
| 09/03/1991 | US5046111 Methods and apparatus for optically determining the acceptability of products |
| 09/03/1991 | US5046018 Agent gas analyzer and method of use |
| 09/03/1991 | US5045710 Coplanarity inspection machine |