| 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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| 05/03/1989 | EP0313655A1 Oxygen concentration probe | 
| 05/03/1989 | EP0313648A1 Process for nitrogen oxides reduction and minimization of the production of other pollutants. | 
| 05/03/1989 | DE3831880A1 Method for the examination of ultra-fast processes | 
| 05/03/1989 | CN1004104B High speed multiple frames interferometer for transient flow field | 
| 05/02/1989 | US4827143 Monitor for particles of various materials | 
| 05/02/1989 | US4827142 Method and system for optically testing sawn timber for faults | 
| 05/02/1989 | US4827141 Subresolution element spatial measurement technique | 
| 05/02/1989 | US4827134 Device for collecting samples | 
| 05/02/1989 | US4827121 System for detecting chemical changes in materials by embedding in materials an unclad fiber optic sensor section | 
| 05/02/1989 | US4826759 Field assay for ligands | 
| 05/02/1989 | US4826660 For detecting light | 
| 05/02/1989 | US4826659 Apparatus for feed-in and ejection of chemical analysis slide | 
| 05/02/1989 | US4826327 Dewpoint meter | 
| 05/02/1989 | US4826319 Method and apparatus for measuring immunological reaction with the aid of fluctuation in intensity of scattered light | 
| 05/02/1989 | US4826318 Apparatus for electrothermal atomization | 
| 05/02/1989 | US4826317 Split-image optical system for the observation of surface structures | 
| 05/02/1989 | US4826316 Radiation detection apparatus | 
| 05/02/1989 | US4826314 Echometer for locating defects which affect light conductors | 
| 05/02/1989 | US4826313 Method of analysis | 
| 05/02/1989 | CA1253357A1 Multi-probe system for measuring bubble characteristics gas hold-up, liquid hold-up and solid hold-up in a three-phase fluidized bed | 
| 04/27/1989 | DE3833899A1 Spectral-photometric device for measuring distance | 
| 04/27/1989 | DE3735286A1 Method for determining the composition of mineral deposits | 
| 04/27/1989 | DE3735013A1 Tubular furnace for the electrothermal atomisation of samples in atomic absorption spectroscopy | 
| 04/27/1989 | DE3734588A1 Recording photometer of high adaptability | 
| 04/27/1989 | DE3734401A1 Laser absorption spectrometer | 
| 04/27/1989 | DE3734192A1 Verfahren zum automatischen messen der fadendichte pro laengeneinheit, zb cm, von bewegten warenbahnen A method for automatically measuring the thread density per laengeneinheit, eg cm, were moving tracks | 
| 04/26/1989 | EP0312919A2 Device for determining of superficial humidity | 
| 04/26/1989 | EP0312826A2 Device for analysing a plurality of gases | 
| 04/26/1989 | EP0312788A2 Device for measurement of visual range | 
| 04/26/1989 | EP0312765A2 Nulling optical bridge for contactless measurement of changes in reflectivity and/or transmissivity | 
| 04/26/1989 | EP0312761A1 Device for checking linear dimensions of parts | 
| 04/26/1989 | EP0312736A1 Surface profile analyzer | 
| 04/26/1989 | EP0312650A1 Process and device for material machining using a laser | 
| 04/26/1989 | CN2036668U Smoke intensity automatic monitoring apparatus | 
| 04/26/1989 | CN1032587A optoacoustic spectroscopy | 
| 04/25/1989 | USRE32912 Parabolic focusing apparatus for optical spectroscopy | 
| 04/25/1989 | USRE32911 Adjustable waveform spark source | 
| 04/25/1989 | US4825407 Method and circuit for controlling single chip microcomputer | 
| 04/25/1989 | US4825094 Real time particle fallout monitor with tubular structure | 
| 04/25/1989 | US4825076 Infra-red spectrophotometric apparatus | 
| 04/25/1989 | US4824791 Thermostated cuvette set | 
| 04/25/1989 | US4824790 Furnace, optical analysis cell | 
| 04/25/1989 | US4824789 Gas sensor | 
| 04/25/1989 | US4824640 Transparent test strip system | 
| 04/25/1989 | US4824250 Non-destructive testing by laser scanning | 
| 04/25/1989 | US4824249 Systems for the direct analysis of solid samples by atomic emission spectroscopy | 
| 04/25/1989 | US4824248 Stabilized sensor device | 
| 04/25/1989 | US4824244 Sensor for mixing ratio of gasoline and alcohol or the like | 
| 04/25/1989 | US4824242 Non-invasive oximeter and method | 
| 04/25/1989 | US4824241 Atomic spectroscopy | 
| 04/25/1989 | US4824240 Internal laser interferometer | 
| 04/25/1989 | US4824209 Generating a narrow beam | 
| 04/25/1989 | US4824206 Modular fiber optic chemical sensor | 
| 04/25/1989 | US4823841 Fluid mixing device, in particular hot and cold water mixing device | 
| 04/25/1989 | CA1253061A1 Method of determining rapidly the concentration of the total sulphur dioxide and the lignosulphonate present in sulphite pulping process liquors | 
| 04/20/1989 | WO1989003525A1 Single molecule tracking | 
| 04/20/1989 | WO1989003524A1 Solution loading analyzer | 
| 04/20/1989 | WO1989003523A1 Gas analyzer | 
| 04/20/1989 | WO1989003522A1 Method and apparatus for controlling and detecting modifications of a surface condition | 
| 04/20/1989 | WO1989003515A1 Multi-channel molecular gas analysis by laser-activated raman light scattering | 
| 04/20/1989 | WO1989003508A1 Device for checking linear dimensions of parts | 
| 04/20/1989 | WO1989003507A1 Device for checking linear dimensions of parts | 
| 04/20/1989 | WO1989003193A1 Apparatus and method for use in pulse oximeters | 
| 04/20/1989 | DE3833752A1 Illumination arrangement for a device for controlling planar structures, in particular textile webs | 
| 04/20/1989 | DE3734001A1 Apparatus for atomic absorbtion spectroscopy | 
| 04/19/1989 | EP0312293A2 Sensing device for analysis | 
| 04/19/1989 | EP0311991A2 Method and apparatus for detecting significant difference of sheet material | 
| 04/19/1989 | EP0311990A2 Method and apparatus for detecting disparity of cyclic length of printed patterns | 
| 04/19/1989 | EP0311761A2 Tubular furnace for the electrothermal atomization of samples in atomic absorption spectroscopy | 
| 04/19/1989 | EP0311655A1 Multi-part differential analyzing apparatus utilizing light scatter techniques. | 
| 04/19/1989 | EP0097695B1 Procedure for the production of a humidity-sensitive interference mirror, and procedure and equipment for the measurement of the humidity using said mirror | 
| 04/19/1989 | CN1032456A 测量头 Measuring head | 
| 04/18/1989 | US4823394 Pattern recognition system | 
| 04/18/1989 | US4823169 Reflection density measuring system | 
| 04/18/1989 | US4823168 Flow-through cell for a photometer formed using a pair of cell body members | 
| 04/18/1989 | US4823167 Catheter calibration device | 
| 04/18/1989 | US4823166 Optical time-domain reflectometry | 
| 04/18/1989 | US4823008 Apparatus and methods employing infrared absorption means to measure the moisture content of heavy grades of paper | 
| 04/18/1989 | US4822878 Cyclic anhydride derivatives of chromophors | 
| 04/18/1989 | US4822746 Mixing absorber ligand and fluorophor, transferring energy, emission of light of different wavelength | 
| 04/18/1989 | US4822743 Method and cloth for detecting leaks in closed bodies | 
| 04/18/1989 | US4822568 For use with renal dialysis or artificial cardiopulmonary systems | 
| 04/18/1989 | US4822564 Photodiode receivers light emitted by reaction with ozone; for exhaust gases from internal combustion engines | 
| 04/18/1989 | US4822169 Measuring assembly for analyzing electromagnetic radiation | 
| 04/18/1989 | US4822168 Spectroscopic photometer for flow through sample absorption | 
| 04/18/1989 | US4822167 Laser fluorometric detector for microcolumn chromatography | 
| 04/18/1989 | US4822166 Flow-through cells for spectroscopy | 
| 04/18/1989 | US4822165 Device for illuminating components of transparent material in testing for irregularities | 
| 04/18/1989 | US4822127 Multi-channel optical transmission system | 
| 04/18/1989 | CA1252849A1 Glassware inspection using optical streak detection | 
| 04/18/1989 | CA1252824A1 Body fluid data storage by light flux values from impregnated reagent | 
| 04/18/1989 | CA1252703A1 Diagnostic saliva test for detecting periodontal disease | 
| 04/18/1989 | CA1252701A1 Cuvette | 
| 04/18/1989 | CA1252645A1 Method and apparatus for measuring water content | 
| 04/18/1989 | CA1252644A1 Color sensor | 
| 04/13/1989 | DE3832906A1 Photo-acoustic spectrometer | 
| 04/13/1989 | DE3732181A1 Apparatus for producing and comparing the spark or arc discharges of material samples of metal | 
| 04/12/1989 | EP0311561A1 Measuring head | 
| 04/12/1989 | EP0311518A2 On-line paper sheet strength determination method and device | 
| 04/12/1989 | EP0311382A2 Analysis method for atomic emission spectrometry |