| Patents for G01N 9 - Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity (6,694) |
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| 08/13/1991 | US5039856 Process and device for quantitative radiation absorption measurement |
| 08/13/1991 | CA1287663C Method and apparatus for measuring physical adsorption of gasesbased on dielectric measurements |
| 08/07/1991 | EP0439735A1 Open cage density sensor |
| 08/07/1991 | CN2082412U Intelligent measuring device for solid density |
| 07/30/1991 | US5035146 Method and apparatus for determining steam quality and/or flow rate from impact force and flow restriction data |
| 07/30/1991 | US5035139 Process and a device for carrying out measurements at a foaming liquid |
| 07/25/1991 | WO1991010882A1 Mass-volume vortex flowmeter |
| 07/20/1991 | CA2034240A1 Mass-volume vortex flowmeter |
| 07/17/1991 | CN1053125A Measuring unit for liquid specific gravity and level |
| 07/17/1991 | CN1053124A Physical parameter collector for slurry |
| 07/09/1991 | US5029482 Gas/liquid flow measurement using coriolis-based flow meters |
| 07/03/1991 | CN2080175U Subsidiary device of electronic scale density measuring |
| 07/02/1991 | US5027499 Diposition of wall; dissolving; thermoconductivity recording |
| 06/26/1991 | EP0434207A2 Gas pressure comparison pycnometer |
| 06/26/1991 | CN1052551A Specific weight measurement of trace body fluid and measurer |
| 06/25/1991 | US5027076 Open cage density sensor |
| 06/25/1991 | US5025665 Non-contacting on-line paper strength measuring system |
| 06/25/1991 | US5025656 Densitometer |
| 06/19/1991 | EP0432883A1 Determining fluid properties |
| 06/12/1991 | EP0430961A1 Apparatus and method of determining a person's body density or fat level |
| 06/12/1991 | CN1012843B Industry fuel densitometer by optical fiber technique |
| 06/11/1991 | US5022261 Aneroid volume determining system |
| 06/07/1991 | WO1991008447A1 A flow tube drive circuit having a bursty output for use in a coriolis meter |
| 06/05/1991 | CN2078439U Instrument for measuring gold content |
| 06/04/1991 | US5020368 Method and system measuring a vertical density profile of a fluid |
| 05/29/1991 | CN2077995U Passive on-line detecting device of oil-water emulsion specific gravity |
| 05/29/1991 | CN1051789A Method and procedure for on-line measurement of fluid properties for control and optimization |
| 05/15/1991 | EP0426842A1 Quantitative imaging employing scanning equalization radiography |
| 05/07/1991 | US5013488 Apparatus for control of hard water scale in evaporative coolers |
| 04/30/1991 | US5012091 Production logging tool for measuring fluid densities |
| 04/26/1991 | CA2028491A1 Method and procedure for on-line measurement of fluid properties for control and optimization |
| 04/23/1991 | US5009109 Flow tube drive circuit having a bursty output for use in a coriolis meter |
| 04/23/1991 | CA1283304C Measuring flow in a pipe |
| 04/17/1991 | EP0422017A1 Method and apparatus for measuring the thickness of a coating on a substrate. |
| 04/16/1991 | US5008914 Quantitative imaging employing scanning equalization radiography |
| 04/16/1991 | US5007277 Method for forming precision liquid/vapor separated bristle assembly |
| 04/09/1991 | US5005426 Mass-volume vortex flowmeter |
| 04/09/1991 | US5005408 Gas weights compensation method for liquid depth gauging system |
| 04/09/1991 | US5005400 Dual frequency density meter |
| 04/02/1991 | US5005194 Method and apparatus for detecting in conformity with process time mixing ratios in plastics and rubber compounding |
| 03/26/1991 | US5003502 Digital filter for random variable |
| 03/20/1991 | EP0417885A2 Apparatus and method for analyzing well fluid sag |
| 03/19/1991 | US5000843 Culture fluid concentrator |
| 03/07/1991 | WO1991002963A1 Densitometer |
| 03/07/1991 | CA2059648A1 Densitometer |
| 03/06/1991 | CN2072686U Small-diameter high-temp. high-pressure differential densimeter |
| 02/26/1991 | US4996656 Densitometer with remotely disposed control electronics |
| 02/19/1991 | US4993263 Plastic hydrometer |
| 02/06/1991 | EP0411023A1 A method and apparatus for ascertaining the net weight of a frozen, ice-coated product |
| 02/05/1991 | US4991153 Vibration type transducer |
| 02/05/1991 | US4991124 System and method for ultrasonic determination of density |
| 02/05/1991 | US4989453 Battery condition indicator |
| 01/30/1991 | CN1011441B Measuring instrument for gas density |
| 01/29/1991 | US4987778 Comparative temperature compensating specific gravity test apparatus |
| 01/22/1991 | US4986654 Method and apparatus for contactless acquisition of data for the locally resolved determination of the density and temperature in a measurement volume |
| 01/16/1991 | EP0408262A2 Optimum centrifugal separation of particles by transient analysis and feedback |
| 01/15/1991 | US4985834 System and method employing pipelined parallel circuit architecture for displaying surface structures of the interior region of a solid body |
| 01/15/1991 | US4984451 Method for determining physical properties of liquids |
| 01/10/1991 | DE3920052A1 Inertial mass measuring system deriving physical characteristics - uses vibrating oscillator working with higher and/or variable damping e.g. in liq. |
| 01/02/1991 | CN2068679U Sucktion plastic liquid densimeter |
| 01/01/1991 | US4981042 Apparatus for determining the density of a liquid |
| 12/23/1990 | WO1991000513A1 Method of obtaining accurate compositional information of multilayer compositions |
| 12/23/1990 | CA2062752A1 Method of obtaining accurate compositional information of multilayer compositions |
| 12/13/1990 | WO1990015421A1 Quantitative imaging employing scanning equalization radiography |
| 12/12/1990 | EP0402012A2 Non-destructive examination of contents of containers |
| 12/05/1990 | EP0400770A2 Measuring the strength of a material within a moving web |
| 12/04/1990 | US4975578 Method and apparatus for determining distribution of mass density |
| 12/01/1990 | CA2011912A1 Non-contacting on-line paper strength measuring system |
| 11/28/1990 | CN1010612B Device for measuring accumulator electrolyte parameters |
| 11/27/1990 | US4974245 System for the assembly of a metal joining piece and a high pressure composite material tube notably applications for equipment used in the oil industry |
| 11/22/1990 | EP0398407A1 Device for measuring the refractive index of a fluid, in particular intended for measuring the density of that fluid or the concentration of a substance dissolved in that fluid |
| 11/15/1990 | DE3915475A1 Sensor measuring charge of accumulator with moving float - dependent on acid density and float on surface of electrolyte and sensor for measuring temp. |
| 11/14/1990 | CN1046977A Vacuum mfg. salt serous solid-to-liquid ratio determined by differential pressure changing conveying unit |
| 11/13/1990 | US4969362 Dual element transducer |
| 11/07/1990 | EP0396283A2 Thickness/density measuring apparatus |
| 11/06/1990 | US4967739 Method of and apparatus for making rod-shaped articles of the tobacco processing industry |
| 11/06/1990 | US4967595 Aviation fuel sample tester |
| 10/30/1990 | CA1275578C Simplified test element advancing mechanism having positive engagementwith element |
| 10/24/1990 | EP0393305A2 Method and apparatus for determining distribution of mass density |
| 10/21/1990 | CA2014893A1 Thickness/density measuring apparatus |
| 10/18/1990 | WO1990012307A1 Device for measuring volume mass and fluid level in situ |
| 10/18/1990 | WO1990012306A1 Vibrating densimeter sensor |
| 10/17/1990 | CN2064056U Automatic controlling instrument of liquid specific gravity |
| 10/17/1990 | CN1046221A Fluid flow volumetric determination apparatus and method |
| 10/16/1990 | US4962671 Single vibrating tube transducers |
| 10/10/1990 | EP0308493A4 Thickness/density measuring apparatus |
| 10/10/1990 | CN2063641U Dynamometer type densimeter |
| 10/09/1990 | US4961345 Vibration type transducer |
| 09/25/1990 | US4959228 Measurement of specific gravity during fermentation |
| 09/18/1990 | CA1274321A1 Method of determining the density of substrata |
| 09/18/1990 | CA1274101A1 Determination of steam quality in thermal injection wells |
| 09/11/1990 | US4956793 Method and apparatus for measuring the density of fluids |
| 09/11/1990 | CA1273824A1 Flowmeter |
| 09/11/1990 | CA1273823A1 Method and apparatus for determining the bulk density of wood |
| 09/11/1990 | CA1273818A1 Measurement of optical density via nephelometry |
| 09/05/1990 | EP0385281A2 Process and apparatus for real-time recording of composition rakes during the preparation of plastics or rubbers |
| 08/31/1990 | CA2011064A1 Method and apparatus for detecting in conformity with process time mixing ratios in plastics and rubber compounding |
| 08/23/1990 | WO1990009573A1 Apparatus and method for determining powder characteristics |
| 08/22/1990 | EP0382819A1 Mass-volume flowmeter |
| 08/21/1990 | US4949572 Method and apparatus for determining physical properties of liquids |