| 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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| 12/13/1977 | US4063094 Gas analyzer |
| 12/13/1977 | US4062651 Ignition means in a chemical analyzer flame photometer |
| 12/13/1977 | US4062650 Thermoluminescent aerosol analysis |
| 12/06/1977 | US4061918 Measurement of low concentration gases |
| 12/06/1977 | US4061788 Worm detection process |
| 12/06/1977 | US4061726 Manufacture of acicular γ-iron(III) oxide |
| 12/06/1977 | US4061543 Bioassay for drugs and antibiotics |
| 12/06/1977 | US4061428 Scanning color densitometer |
| 11/29/1977 | US4060708 Metastable argon stabilized arc devices for spectroscopic analysis |
| 11/29/1977 | US4060326 Optical instrument for measuring concentrations of polluting gases on long and short geometrical paths |
| 11/22/1977 | US4059357 Densitometer calibrated reference standard |
| 11/22/1977 | US4059356 Gas detector |
| 11/15/1977 | US4058737 Method and apparatus for detecting extraneous solid substances contained in liquid |
| 11/15/1977 | US4058736 Method and apparatus for inspecting extraneous solid substances contained in liquid |
| 11/15/1977 | US4058732 Method and apparatus for improved analytical fluorescent spectroscopy |
| 11/15/1977 | US4058725 Infrared absorption spectrometer employing a dual optoacoustic detector |
| 11/15/1977 | US4058370 Apparatus for accurate pipetting of small liquid volumes |
| 11/08/1977 | US4057724 Determination of the alcohol content of blood |
| 11/08/1977 | US4057721 Oil pollution monitoring and monitoring unit |
| 11/08/1977 | US4057394 Test device and method for determining blood hemoglobin |
| 11/08/1977 | US4057352 Color grading apparatus utilizing infrared light source |
| 11/08/1977 | US4057351 Coherent scanning system for fabric inspection |
| 11/08/1977 | US4057349 Spectroscopic temperature measurement |
| 11/01/1977 | US4056724 Fluorometric system, method and test article |
| 11/01/1977 | US4056716 Defect inspection of objects such as electronic circuits |
| 11/01/1977 | US4056358 Apparatus for deriving blood oxygen association curve information |
| 10/25/1977 | US4055783 Spark source with regulation of spark magnitude by control of spark timing |
| 10/25/1977 | US4055768 Light measuring apparatus |
| 10/25/1977 | US4055764 Optically selective, acoustically resonant gas detecting transducer |
| 10/25/1977 | US4055752 Method and apparatus for the determination of enzyme activity |
| 10/25/1977 | US4055470 Device for examining biological specimens |
| 10/25/1977 | US4055395 Analysis apparatus |
| 10/25/1977 | US4055382 Testing method for the separate determination of varying work surface flaws and arrangement for said method |
| 10/25/1977 | US4055083 Chemical tracer method of and structure for determination of instantaneous and total mass and volume fluid flow |
| 10/18/1977 | US4054535 Variable sensitivity water washable dye penetrant |
| 10/18/1977 | US4054415 Body fluid and blood electrolyte analyzer |
| 10/18/1977 | US4054391 Specular reflectance microdensitometer |
| 10/18/1977 | US4054390 Apparatus for investigating fast chemical reactions by optical detection |
| 10/18/1977 | US4054384 Sample-background-signal autocancellation in fluid-sample analyzers, using symmetrical time-delay or time-averaging |
| 10/18/1977 | US4054377 Method and apparatus for examining sheet material |
| 10/11/1977 | US4053237 Measuring the surface of a roller by glossmeter |
| 10/11/1977 | US4053236 Absorbance measuring photometer |
| 10/11/1977 | US4053235 Digital reflection densitometer system |
| 10/11/1977 | US4053232 Rotating-compensator ellipsometer |
| 10/11/1977 | US4053229 2°/90° Laboratory scattering photometer |
| 10/04/1977 | US4052615 Spherical cavity method and apparatus for measuring a sheet material property using infrared radiation |
| 10/04/1977 | US4052120 Optical apparatus for producing a light curtain |
| 09/27/1977 | US4051372 Infrared optoacoustic gas analyzer having an improved gas inlet system |
| 09/27/1977 | US4050895 Optical analytical device, waveguide and method |
| 09/27/1977 | US4050824 Method and apparatus for inspecting bottled goods |
| 09/27/1977 | US4050823 Light source, interference filter, photodetector |
| 09/27/1977 | US4050820 Light-reflecting analytical device |
| 09/27/1977 | US4050450 Reflection standard for fiber optic probe |
| 09/27/1977 | US4050384 Tube inspection and servicing apparatus |
| 09/20/1977 | US4049987 Ozone absorbance controller |
| 09/20/1977 | US4049970 Pulsed radiation detector system |
| 09/20/1977 | US4049568 Biodegradable; nonionic surfactants and silica |
| 09/20/1977 | US4049383 Method of detecting gaseous contaminants |
| 09/20/1977 | US4049350 Process and apparatus for detecting inclusions |
| 09/13/1977 | US4048510 Circuit arrangements for controlling detector signals in surface inspection systems |
| 09/13/1977 | US4048499 Infrared absorption spectroscopy of liquids employing a thermal detector |
| 09/13/1977 | US4047890 Method and apparatus for determining deficiencies in enzymatic reactors particularly clotting factor levels in blood plasmas |
| 09/13/1977 | US4047820 Constant temperature, multiple sample, rotary changer |
| 09/13/1977 | US4047817 Photographic color densitometer check plate |
| 09/13/1977 | US4047815 Measurement of standard visual range |
| 09/06/1977 | US4047205 Method and means for measuring substance volumes in light-transmitting samples |
| 09/06/1977 | US4047032 Standard for spectral reflectance |
| 09/06/1977 | US4046511 Pipettor apparatus |
| 09/06/1977 | US4046477 Interferometric method and apparatus for sensing surface deformation of a workpiece subjected to acoustic energy |
| 08/30/1977 | US4045772 Automatic focusing system |
| 08/30/1977 | US4045679 Fluorescent gas analyzer |
| 08/30/1977 | US4045671 Method and apparatus for continuously monitoring the presence of oil in water |
| 08/30/1977 | US4045668 Method and apparatus for immiscible liquids measurement |
| 08/23/1977 | US4044253 Non-destructive inspection of composite and adhesively bonded structures |
| 08/23/1977 | US4043678 Cuvette |
| 08/23/1977 | US4043676 Photometer |
| 08/23/1977 | US4043669 Light scattering test apparatus |
| 08/23/1977 | US4043668 Portable reflectance spectrometer |
| 08/23/1977 | US4043177 Method to observe damage induced in optical elements by intense thermal radiation |
| 08/16/1977 | US4042723 Method for monitoring the properties of plastic coatings on optical fibers |
| 08/16/1977 | US4042304 Christiansen effect detector |
| 08/16/1977 | US4042303 Method and apparatus for automated sampling with an atomic absorption spectrometer |
| 08/09/1977 | US4041313 Emittance calorimetric method |
| 08/09/1977 | US4041310 Cracks or flaws detection, biodegradable |
| 08/09/1977 | US4040790 Moisture and rust detector for hydraulic control systems |
| 08/09/1977 | US4040786 Chemical analysis method using reaction container |
| 08/09/1977 | US4040750 Real time reflectometer |
| 08/09/1977 | US4040749 Organic vapor detection with liquid crystals |
| 08/09/1977 | US4040748 Inspection tool |
| 08/09/1977 | US4040747 Optical analyzer for agricultural products |
| 08/09/1977 | US4040745 Inspection tool |
| 08/09/1977 | US4040743 Method and apparatus for measuring the brightness of pulp slurry |
| 08/09/1977 | US4040742 Capillary flow method and apparatus for determination of cell osmotic fragility |
| 08/09/1977 | US4040691 Waveguide holder-humidifier |
| 08/02/1977 | US4039843 Complementary mask image digitizer method and apparatus |
| 07/26/1977 | US4038556 Method and apparatus for simultaneous optical measurement of particle characteristics |
| 07/26/1977 | US4038555 Photometric measuring system |
| 07/26/1977 | US4038554 Detection of flaws in a moving web of transparent material |
| 07/26/1977 | US4038055 Gas chromatograph for continuous operation with infrared spectrometer |
| 07/26/1977 | US4038030 Medical diagnosis |