| 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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| 01/02/1992 | DE4018664A1 Grid refractometer measuring refractive index and/or stabilising - has stable air gap for use as beam splitter for wavelengths of EM radiation in medium |
| 01/01/1992 | CN2092099U 桩孔检测仪 Pile Detector |
| 01/01/1992 | CN1057538A Simple fire detector |
| 12/31/1991 | US5077481 Optical probe for measuring light transmission of liquid |
| 12/31/1991 | US5077480 Transmissometer having solid state light source |
| 12/31/1991 | US5077476 Instrument for non-invasive measurement of blood glucose |
| 12/31/1991 | US5077475 Method for quantitative evaluation method of optical absorption image for determination of resistivity dispersion |
| 12/31/1991 | US5077469 Calibrating a nondispersive infrared gas analyzer |
| 12/31/1991 | US5077013 Miniature laboratory for performing biological analyses by chemical reaction on a sample of blood |
| 12/31/1991 | US5076909 Analyzing for aromatics by ultraviolet radiation |
| 12/31/1991 | US5076699 Method and apparatus for remotely and portably measuring a gas of interest |
| 12/31/1991 | US5076696 Dynamic imaging microellipsometry |
| 12/31/1991 | US5076692 Particle detection on a patterned or bare wafer surface |
| 12/31/1991 | US5076691 Non-reflecting structures for surface scanners |
| 12/31/1991 | US5076237 Means and method for measuring and controlling smoke from an internal combustion engine |
| 12/30/1991 | WO1992000516A1 Biomimetic sensor that simulates human response to airborne toxins |
| 12/28/1991 | WO1992000515A1 Reservoir chemical sensors with optional removable reservoir cells |
| 12/28/1991 | WO1992000513A1 Non-invasive measurement of blood glucose |
| 12/28/1991 | CA2086000A1 Reservoir chemical sensors with optional removable reservoir cells |
| 12/27/1991 | EP0462755A1 Detecting the presence of a substance in a fluid |
| 12/27/1991 | EP0462642A1 Optical smoke, aerosol and dust detector and fire detector apparatus with optical detector |
| 12/27/1991 | EP0462278A1 Device for measuring gas optical density |
| 12/27/1991 | EP0462251A1 Method for the detection of plants |
| 12/27/1991 | EP0462240A1 Process and device for the contactless testing of areal and spatial test pieces |
| 12/27/1991 | EP0462203A1 Analyte assay device and apparatus |
| 12/27/1991 | EP0277170B1 Separation process |
| 12/26/1991 | WO1991020093A1 Ellipsometric control of material growth |
| 12/26/1991 | WO1991019979A1 Antioxidant assay |
| 12/26/1991 | WO1991019970A1 Method and apparatus for measuring the contents of components of skim milk, milk, cream and cheese using near infrared ray |
| 12/26/1991 | WO1991019932A1 Wastewater pollutant sensor |
| 12/26/1991 | WO1991019614A1 Security of objects or documents |
| 12/25/1991 | CN2091457U Intelligence light interference gas detecting instrument |
| 12/25/1991 | CN2091456U High-temp. liquid concentration on-line detecting device |
| 12/25/1991 | CN1057363A Installation for study or transformation of surface of samples placed in vacuum or in controlled atmosphere |
| 12/25/1991 | CN1057337A Method of mfg. specimen pool of photom or spectral measuring apparatus |
| 12/24/1991 | US5075563 Photometer head with housing portions having a gap therebetween |
| 12/24/1991 | US5075556 Acridine orange derivatives and their use in the quantitation of reticulocytes in whole blood |
| 12/24/1991 | US5075552 Apparatus and method for transient thermal infrared emission spectrometry |
| 12/24/1991 | US5075551 Infrared absorption enhanced spectroscopic apparatus |
| 12/24/1991 | US5075550 Infrared detector for hydrogen fluoride gas |
| 12/24/1991 | US5075544 Optical color change device for detecting electrical abnormality |
| 12/24/1991 | US5075235 Process for direct determination of complex corrosive environmental conditions |
| 12/24/1991 | US5075127 Water insoluble, permeable, crosslinked cellulose and opaque agent |
| 12/24/1991 | US5075079 Incubation |
| 12/24/1991 | US5074669 Method and apparatus for evaluating ion implant dosage levels in semiconductors |
| 12/24/1991 | US5074668 Optical scanner |
| 12/24/1991 | US5074666 High stability interferometer for measuring small changes in refractive index and measuring method using the interferometer |
| 12/24/1991 | US5074663 Multiple internal reflection cell having vented dual seals |
| 12/24/1991 | US5074662 Sample holder for spectroscopic studies of optical film |
| 12/24/1991 | US5074661 Methods and apparatus for retroreflective surface inspection and distortion measurement |
| 12/24/1991 | US5074659 Device for detecting alcoholic content |
| 12/24/1991 | US5074397 Rotary index apparatus |
| 12/24/1991 | US5074158 Powder granule sample inspection apparatus |
| 12/24/1991 | CA1293590C Assaying method for primary amines using aromatic dialdehydes |
| 12/24/1991 | CA1293489C Multicuvette rotor assembly |
| 12/23/1991 | CA2044679A1 Detection of hiv infection by bioluminescence |
| 12/20/1991 | WO1991019906A1 Gaseous fluid aspirator or pump |
| 12/20/1991 | CA2085009A1 Gaseous fluid aspirator or pump |
| 12/19/1991 | DE4031058C1 Device for bobbin thread end to be sewn in sewing machine - comprises unit to emit light which is reflected by bobbin web to the opening height |
| 12/19/1991 | DE4025842A1 Colorimetric detector with reagent reservoir - has reagent collection chamber through which carrier is passed for uniform moistening with reagent sol. |
| 12/19/1991 | DE4018847A1 Fibre debris monitor - has camera linked to evaluation unit with analogue-digital converter |
| 12/18/1991 | EP0461953A2 Improved device for monitoring the surface state of a ground, on a mobile susceptible to come into contact with the ground |
| 12/18/1991 | EP0461862A1 Industrial colorimeter having lamp aging compensation means |
| 12/18/1991 | EP0461780A2 Infrared holographic defect detector |
| 12/18/1991 | EP0461618A2 Cleaning cycle for flow cytometers |
| 12/18/1991 | EP0461473A2 Method and means for eliminating clouding in biological fluids |
| 12/18/1991 | EP0461424A2 Device to optically detect a coating |
| 12/18/1991 | EP0461404A2 Method for manufacturing a cuvette for photometrical or spectrometrical measuring devices |
| 12/18/1991 | EP0461338A1 Print inspection method |
| 12/18/1991 | EP0461239A1 Method and apparatus for measuring entrained air in concrete |
| 12/18/1991 | CN2090987U Fast carbohydrate measurer for raw cotton |
| 12/18/1991 | CN1015089B Method for selecting by optic and electronic technology and apparatus therefor |
| 12/17/1991 | US5073952 Pattern recognition device |
| 12/17/1991 | US5073951 Method of inspecting an adhesive to fasten a center hub to a magnetic disk |
| 12/17/1991 | US5073719 Apparatus for the evaluation of the erythrosedimentation rate and other |
| 12/17/1991 | US5073712 Charge-separation mass spectrometry method |
| 12/17/1991 | US5073708 Apparatus for inspecting the presence of foreign matters |
| 12/17/1991 | US5073707 Window-transmittance meter having entrance detector |
| 12/17/1991 | US5073345 Light detector apparatus |
| 12/17/1991 | US5073029 For measuring the absorbance |
| 12/17/1991 | US5073028 For measuring color characteristics |
| 12/17/1991 | US5073026 Method for measuring refractive index of thin film layer |
| 12/17/1991 | US5073024 Integrated optical device for measuring the refractive index of a fluid |
| 12/17/1991 | US5072595 Apparatus for detecting small bubbles in a pressurized fluid stream |
| 12/17/1991 | CA1293309C Optical inspection system for cylindrical objects |
| 12/17/1991 | CA1293135C System for on-line molten metal analysis |
| 12/15/1991 | CA2044419A1 Industrial colorimeter having lamp aging compensation means |
| 12/12/1991 | WO1991019187A1 Analytical assay |
| 12/12/1991 | WO1991019184A1 Dispersion photometer, in particular for the kinetic determination of total proteins |
| 12/12/1991 | WO1991019035A1 Method of inspecting cleanliness of top and device used therefor |
| 12/12/1991 | WO1991019025A1 Process for the measurement of the thickness and refractive index of a thin film on a substrate, and a device for carrying out the process |
| 12/12/1991 | WO1991018656A1 Analytical rotors and methods for analysis of biological fluids |
| 12/12/1991 | WO1991018548A1 Method and device for in vivo measuring blood sugar levels |
| 12/12/1991 | DE4018379A1 Continuously determining actual path length in optical fibre - deriving measurement signal as function of phase difference between modulation and photodiode signals |
| 12/12/1991 | CA2042092A1 Infrared holographic defect detector |
| 12/11/1991 | EP0460712A2 Method and device for laying fabric webs having faults |
| 12/11/1991 | EP0460699A1 Yarn storage and delivery device |
| 12/11/1991 | EP0460431A1 A method of and an equipment for optical inspection of strip and sheet products |
| 12/11/1991 | EP0460343A2 Disposable measuring element for analysing liquid or gaseous samples |
| 12/11/1991 | EP0456751A4 Test swab and methods of making and using same |