| Patents for G01N 27 - Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means (109,839) |
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| 05/28/1991 | US5019707 High speed waveform sampling with a tunneling microscope |
| 05/28/1991 | US5019238 Means for quantitative determination of analyte in liquids |
| 05/28/1991 | US5019236 Retractable member for fluid, optical and electrical communication in capillary zone electrophoresis |
| 05/28/1991 | US5019235 Electrode coated with ion exchange resin |
| 05/28/1991 | US5019232 Medium for electrophoresis |
| 05/28/1991 | US5018527 Sensor for the measurement of ion activity |
| 05/28/1991 | US5018380 Dielectric sensors |
| 05/28/1991 | US5018348 Method for detecting the condition of catalytic converters |
| 05/28/1991 | CA1284454C Implantable gas-containing biosensor and method for measuring an analyte such as glucose |
| 05/28/1991 | CA1284415C Apparatus and method for gel casting |
| 05/23/1991 | DE4034751A1 Magnetic crack testing of bore soffit(s) accessible from one side only - applying fluorescent powder to make defects visible under magnetisation |
| 05/23/1991 | DE3934654A1 Break testing of continuous carrier belt - using carrier strands in non-conducting strap interconnected to form continuous conducting body |
| 05/23/1991 | DE3921537A1 Measurement method for improving stability of MIS and MOS sensors - uses time alternating measurement or drive signals instead of DC |
| 05/22/1991 | EP0427958A1 Device for the electrical power supply of an oxygen pump forming part of a linear oxygen probe |
| 05/22/1991 | EP0427845A1 Gel casting method and apparatus |
| 05/22/1991 | EP0427808A1 Method of drug detection |
| 05/22/1991 | CN2077548U Magnetic probe with device for automatically spraying magnetic powder |
| 05/22/1991 | CN2077547U Displaying board of magnetic detector of defects |
| 05/22/1991 | CN1051624A Multielectrode sensor for detecting dissolved oxygen |
| 05/21/1991 | US5017912 Electrical detection of shear pin operation |
| 05/21/1991 | US5017908 Security system for sensing leakage of fluid from containers |
| 05/21/1991 | US5017879 Capacitive void fraction measurement apparatus |
| 05/21/1991 | US5017875 Disposable sensor |
| 05/21/1991 | US5017869 Swept frequency eddy current system for measuring coating thickness |
| 05/21/1991 | US5017540 Silicon hydride surface intermediates for chemical separations apparatus |
| 05/21/1991 | US5017340 Oxygen sensors |
| 05/21/1991 | US5017339 Apparatus for measuring the components of a sample |
| 05/21/1991 | US5017266 Piezoelectric transducer |
| 05/16/1991 | WO1991006868A1 Bilirubin assay using electrochemical oxidation |
| 05/16/1991 | WO1991006854A1 Method for use in assessing the physical state of ground materials and apparatus for use therein |
| 05/16/1991 | WO1991006851A1 Flow-rate controlled surface charge coating for capillary electrophoresis |
| 05/16/1991 | WO1991006850A1 Affinity co-electrophoresis |
| 05/16/1991 | WO1991006849A1 Combustible gas detection |
| 05/16/1991 | WO1991006848A1 Method of measuring total quantity of organic substances in ultrapure water and ultrapure water treating system utilizing said method in preparation of ultrapure water |
| 05/16/1991 | WO1991006670A1 Methods of determining bacteria populations electrochemically |
| 05/16/1991 | WO1990013634A3 Enzymes and their use in drug detection |
| 05/16/1991 | DE3937635A1 Determination of gas esp. ammonia in air - using calibrated pH-selective glass membrane measuring electrode |
| 05/16/1991 | DE3937605A1 Moisture sensor to detect a water layer on a car-window - uses 2 capacitor electrodes on or in the glass window which change their mutual capacitance value in the presence of a moisture layer |
| 05/16/1991 | DE3937577A1 Voltametric analysis cell - with holder cavity holding oversize mercury droplet |
| 05/15/1991 | EP0427532A2 High resolution mass spectrometry of recoiled ions for isotopic and trace elemental analysis |
| 05/15/1991 | EP0426989A1 Selective gas sensor |
| 05/15/1991 | EP0426753A1 Method, test probe and apparatus for the measurement of alternating current potential drop. |
| 05/15/1991 | EP0394312A4 A portable blood chemistry measuring apparatus |
| 05/15/1991 | CN2077127U Hall magnetic force crack detector |
| 05/15/1991 | CN1051425A Method for monitoring sulfates and other ions at low concentraiton |
| 05/14/1991 | US5016201 System for calibrating, monitoring and reporting the status of a pH sensor |
| 05/14/1991 | US5015957 Amperometric method for measuring acidity |
| 05/14/1991 | US5015952 Apparatus for characterizing conductivity of materials by measuring the effect of induced shielding currents therein |
| 05/14/1991 | US5015951 Apparatus and methods for measuring permeability and conductivity in materials using multiple wavenumber magnetic interrogations |
| 05/14/1991 | US5015950 Method and apparatus for determining thermal resistance and structural integrity of coatings on conducting materials by monitoring electrical conductance of the underlying material upon localized heating of the overlying coating |
| 05/14/1991 | US5015845 Electrospray method for mass spectrometry |
| 05/14/1991 | US5015616 Strontium oxide compounds in mixture |
| 05/14/1991 | US5015350 Flow-rate-controlled surface-charge coating for capillary electrophoresis |
| 05/14/1991 | US5015346 Electrochemical method for defect delineation in silicon-on-insulator wafers |
| 05/14/1991 | US5014908 Control circuit using a sulphonated fluorocarbon humidity sensor |
| 05/14/1991 | CA1284180C Electronically scanned eddy current flaw inspection |
| 05/08/1991 | EP0426453A2 Sensor for controlling water quality of reactor and method of controlling said water chemistry |
| 05/08/1991 | EP0426012A2 Conductivity meter |
| 05/08/1991 | EP0425658A1 Method and apparatus for producing an arbitrary excitation spectrum for fourier transform mass spectrometry. |
| 05/08/1991 | EP0425509A1 Calibration device for use in calibrating a sensor. |
| 05/08/1991 | EP0347452A4 Counterflow leak detector with high and low sensitivity operating modes |
| 05/08/1991 | CN2076675U Microcomputer controlled measurer for chemical oxygen consumption |
| 05/08/1991 | CN1012604B Zinc metastannate alcohol-sensitive element and method for producing same |
| 05/07/1991 | WO1991006692A1 Ceramic solid electrolyte based electrochemical oxygen concentrator cell and method of fabrication |
| 05/07/1991 | US5014011 Capacitance measuring apparatus with means for nulling the resistive component |
| 05/07/1991 | US5014009 Detector for gas chromatograph for detecting ammonia and amine compounds |
| 05/07/1991 | US5013666 Liquid solution containing buffer, calcium sequestering agent |
| 05/07/1991 | US5013421 Ion-selective electrodes |
| 05/07/1991 | US5013420 Gel electrophoresis/electro-blot apparatus |
| 05/07/1991 | US5012671 Metallic oxide semiconductor |
| 05/07/1991 | US5012670 Oxygen sensor |
| 05/07/1991 | US5012669 Oxygen sensing method and apparatus |
| 05/07/1991 | CA2073052A1 Ceramic solid electrolyte based electrochemical oxygen concentrator cell and method of fabrication |
| 05/07/1991 | CA1283883C Dimensionally stable anode for molten salt electrowinning and method of electrolysis |
| 05/02/1991 | WO1991006083A1 Electrical detection of shear pin operation |
| 05/02/1991 | WO1991006002A1 Electro-chemical measuring sensor for determining the oxygen content of gases |
| 05/02/1991 | WO1991006001A1 Gas sensor arrangement |
| 05/02/1991 | WO1991006000A1 Three-toroid electrodeless conductivity cell |
| 05/02/1991 | WO1991005994A1 Process and measuring device for determining the soot content of exhaust gases |
| 05/02/1991 | WO1991005979A1 Polyaniline compositions, process for their preparation and uses thereof |
| 05/02/1991 | WO1991005598A1 Improved fabric supported electrophoresis agarose gels for electrophoresis |
| 05/02/1991 | EP0424586A2 Method and apparatus for electrochemical immunoassay |
| 05/02/1991 | DE4034551A1 Specimen application arrangement for cataphoretic analysis - uses applicators in cyclically moved holders without developing contamination and at low cost |
| 05/02/1991 | DE4033667A1 Oxygen concn. sensor for gas mixt. has heater - operable at two different potentials to minimise preparation time |
| 05/02/1991 | DE3935149A1 Verfahren und messanordnung zur bestimmung des russgehaltes in abgasen Method and test setup for determination of soot content in exhaust gases |
| 05/02/1991 | DE3935130A1 Checking composition of steel work pieces - using Eddy current technique to measure characteristic values for comparison with reference curves |
| 05/01/1991 | CN2076239U Magnetic crack detector with double winding rotation field |
| 05/01/1991 | CN2076238U Zirconia oxygen meter for by-pass flue of industrial furnace |
| 05/01/1991 | CN2076237U Automatic cement crack property tester |
| 05/01/1991 | CN1051088A Automatic testing meter for electrical absorptance |
| 05/01/1991 | CN1051086A Automatic defect detection technology using electromagnetic ultrasonic |
| 05/01/1991 | CN1012529B Multifunctional differetial-potential digestion instrument |
| 05/01/1991 | CN1012528B Multifunctional oxygen measurer for tissue and cell |
| 05/01/1991 | CA2028787A1 Method for monitoring sulfates |
| 04/30/1991 | US5012197 Apparatus and method for determining the relative percentages of components in a mixture |
| 04/30/1991 | US5012052 Isotope-ratio-monitoring gas chromatography-mass spectrometry apparatus and method |
| 04/30/1991 | US5011861 Membranes for solid phase protein sequencing |
| 04/30/1991 | US5011590 Temperature control device for oxygen concentration sensor |
| 04/30/1991 | US5011589 Using graft siloxane copolymer as reference electrode |
| 04/30/1991 | US5011588 Ion selective dip electrode assembly |