| 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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| 10/14/1981 | EP0037681A2 Method and apparatus for detecting yarns |
| 10/14/1981 | EP0037669A2 System for detecting a web break |
| 10/14/1981 | EP0037484A1 Device for positioning and fastening a test stripe for optical medical measurements |
| 10/13/1981 | US4295199 Automatic fluorometer and data processor for performing fluorescent immunoassays |
| 10/13/1981 | US4295042 Method of and device for measuring chlorophyll of living leaves |
| 10/13/1981 | EP0030542A4 Method for monitoring optical fiber processing. |
| 10/13/1981 | CA1110465A1 Process and device for the evaluation of photometric measurement values |
| 10/07/1981 | EP0036913A2 A dew point hygrometer |
| 10/07/1981 | EP0036870A1 Apparatus for near infrared quantitative analysis |
| 10/06/1981 | US4293308 Combustion in helium, catalytic oxidation and reduction, gas chromatography, flame photometry |
| 10/06/1981 | US4293226 Photographic film blackening area measuring device |
| 10/06/1981 | US4293225 Underwater fluorometer measuring system |
| 10/06/1981 | US4293220 Application of inductively coupled plasma emission spectrometry to the elemental analysis of organic compounds and to the determination of the empirical formulas for these and other compounds |
| 10/06/1981 | US4293219 Method and apparatus for inspecting transparent objects |
| 10/06/1981 | CA1110344A1 High performance electro-optic smoke detector |
| 09/30/1981 | EP0036798A1 Process for titrating uranium (VI) or dialkyldithiophosphoric acid present in organic solvents |
| 09/30/1981 | EP0036731A1 Method of monitoring light signals from liquid medium |
| 09/29/1981 | US4292672 Inspection system for detecting defects in regular patterns |
| 09/29/1981 | US4292664 Used in conjunction with fluorescent dye |
| 09/29/1981 | US4292536 Radiation method and assembly for assessing web parameters |
| 09/29/1981 | US4292526 Isotropically sensitive optical filter employing atomic resonance transitions |
| 09/29/1981 | US4291990 Apparatus for measuring the distribution of irregularities on a mirror surface |
| 09/29/1981 | US4291988 Automated path differencing system |
| 09/29/1981 | US4291987 Hole seeking apparatus |
| 09/29/1981 | US4291986 Optical rate assay apparatus |
| 09/29/1981 | US4291985 Dual beam photometer with rotating filter plate |
| 09/29/1981 | US4291983 Photometric apparatus and method |
| 09/29/1981 | US4291981 Reference scatter for use in the correction of scattering photometers |
| 09/29/1981 | US4291980 Suspension of small spheres used as a standard in measurement of the turbidity of water; refraction |
| 09/29/1981 | US4291975 Apparatus for determining the color characteristics of a gem |
| 09/29/1981 | CA1109942A1 Optical inspection apparatus |
| 09/23/1981 | EP0036370A1 Method and device for evaluating visibility |
| 09/23/1981 | EP0036017A1 Apparatus for analysis. |
| 09/23/1981 | EP0036000A1 Continuous flow automatic chemical analysis systems and components for use therein |
| 09/22/1981 | US4291230 Fluorometric analyzer including shutter means for simultaneously shielding sample and photodetector during sample change |
| 09/22/1981 | US4290997 Apparatus for automatic measurement of the results of agglutination tests |
| 09/22/1981 | US4290776 Method for analyzing acidic substances by high speed liquid chromatography |
| 09/22/1981 | US4290772 Reducing light scatter in photometric measurements involving suspended particles |
| 09/22/1981 | US4290695 Method and apparatus for measurement of transmittance and scatter of light in water |
| 09/22/1981 | US4290433 Method and apparatus for detecting the presence of caries in teeth using visible luminescence |
| 09/22/1981 | US4290296 Method and apparatus for gas dosing for linearization |
| 09/22/1981 | CA1109541A1 Optical smoke detector |
| 09/22/1981 | CA1109540A1 Optical smoke detector circuit |
| 09/22/1981 | CA1109375A1 Process for detecting the oxidation of keratinized fibers and particularly human hair |
| 09/22/1981 | CA1109372A1 Pyrocatechol-amine-water solution for the determination of defects |
| 09/17/1981 | WO1981002635A1 Unified schlieren-interference apparatus,especially for ultracentrifuges |
| 09/17/1981 | WO1981002634A1 Measurement of refractive index profile |
| 09/17/1981 | WO1981002633A1 Photometric apparatus and method |
| 09/15/1981 | US4289975 Dissipating electrical charge |
| 09/15/1981 | US4289406 Light transmission measurement method |
| 09/15/1981 | US4289405 Color monitoring system for use in creating colored displays |
| 09/15/1981 | US4289403 Optical phase modulation instruments |
| 09/15/1981 | US4289402 Spark chamber for a vacuum emission spectrometer |
| 09/09/1981 | EP0035206A2 Method of visualizing the distributions of residual moisture in trajectory-flow wet photographic film layers |
| 09/09/1981 | EP0035081A2 A refractometer |
| 09/09/1981 | EP0035013A1 Process for prophylactic registration of putrefaction in food |
| 09/08/1981 | US4288790 Fire alarm |
| 09/08/1981 | US4288693 Nondispersive infrared gas analyzer |
| 09/08/1981 | US4288228 Whole blood analyses and diffusion apparatus therefor |
| 09/08/1981 | US4288164 Method and apparatus for viewing glowing objects |
| 09/08/1981 | CA1108447A1 Photometer microscope for microphotometer scanning of fine specimen structures |
| 09/08/1981 | CA1108445A1 Interferomic determination of separations within a tire |
| 09/08/1981 | CA1108432A1 Automatic gas flow control apparatus for an atomic absorption spectrometer burner |
| 09/08/1981 | CA1108431A1 Echometre for localising defects affecting light conductors |
| 09/03/1981 | WO1981002467A1 A method for quantitatively determining components in a sample |
| 09/01/1981 | USRE30730 Apparatus for use in investigating specimens |
| 09/01/1981 | US4287427 Liquid-level monitor |
| 09/01/1981 | US4287300 Charge effects in enzyme immunoassays |
| 09/01/1981 | US4286881 Sample cell |
| 09/01/1981 | US4286880 Scanning light beam lumber defect position system and method of using same |
| 09/01/1981 | US4286876 Apparatus and method for measuring scattering of light in particle detection systems |
| 09/01/1981 | US4286873 Refractometer cell with integral lens |
| 09/01/1981 | CA1107983A1 Apparatus and method for sour gas analysis |
| 08/26/1981 | EP0034156A1 Process and device for determining glucose in serum or urine. |
| 08/25/1981 | US4286327 Apparatus for near infrared quantitative analysis |
| 08/25/1981 | US4285906 Automatic determination of coagulation times of twelve blood samples using light from a single source |
| 08/25/1981 | US4285597 Goniophotometer for measuring the gloss and/or light diffusion of surfaces |
| 08/25/1981 | US4285596 Holographic diffraction grating system for rapid scan spectral analysis |
| 08/25/1981 | US4285594 Optical system for densitometer |
| 08/25/1981 | US4285566 Optical scanning apparatus |
| 08/25/1981 | CA1107493A1 Method and apparatus for determining ratio of core radius to cladding radius in clad optical fibers |
| 08/19/1981 | EP0033870A2 Method of measuring slant visibility |
| 08/18/1981 | US4284897 Fluorescence determining microscope utilizing laser light |
| 08/18/1981 | US4284602 Medical centrifuge |
| 08/18/1981 | US4284412 Method and apparatus for automated identification and enumeration of specified blood cell subclasses |
| 08/18/1981 | US4284357 Device for continuously inspecting a surface |
| 08/18/1981 | US4284356 Method of and apparatus for comparing surface reflectivity |
| 08/18/1981 | US4284355 Automated method for cell volume determination |
| 08/18/1981 | US4284354 Sensitive nonlinear optical spectroscopy |
| 08/18/1981 | US4284353 Flaw detecting apparatus |
| 08/18/1981 | US4284352 Heat exchanger for refractometer |
| 08/12/1981 | EP0033335A1 Refractively scanned interferometer. |
| 08/11/1981 | US4283147 Electro-optical scanning system |
| 08/11/1981 | US4283146 Optical detector |
| 08/11/1981 | US4283145 Optical system for the detection of flaws in bottles or the like |
| 08/11/1981 | US4283142 Two beam alternating light colorimeter |
| 08/11/1981 | US4283141 Sample cell and stirrer for spectrophotometry |
| 08/11/1981 | US4283140 Spatially homogenizing optical modulator |
| 08/05/1981 | EP0033253A2 Device for the photometrical measurement of complex solutions with varying background noise |
| 08/04/1981 | US4282510 Apparatus for discerning the noticeable presence of spatial fluctuations of intensity within a two-dimensional visual field |