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| Number | Title | Issue Date |
| 7324694 | Fluid sample analysis using class weights Most automatic particle classification methods produce errors. The invention provides a method for improving the accuracy of particle classification while shortening the amount of manual review time required from the operator. The method uses class weights, which ar... | 01/29/2008 |
| 7294513 | Method and apparatus for characterizing solutions of small particles A method and apparatus is described by which means molecules in suspension may be characterized in terms of the size and mass distributions present. As a sample solution is separated by centrifugal means, it is illuminated at a particular radial distance from the ax... | 11/13/2007 |
| 7275415 | Particulate-based flow sensor A fluid conveyance apparatus having more than one particulate matter sensing probe situated at two or more locations on the apparatus. Signals from the probes from at least two locations may indicate particulate matter flowing within a fluid through the conveyance a... | 10/02/2007 |
| 7269476 | Smart medicine container A medicine dispensing system is provided that comprises of a medicine container with an inbuilt pill dispensing assembly which automatically dispenses a prescribed dose of medicine at prescribed times. It alerts the patient when a dose of medicine has been dispensed... | 09/11/2007 |
| 7111632 | Ultrasonic cleaning device for removing undesirable particles from an object A cleaning device for cleaning an object includes an inner vessel configured to contain a first liquid and the object. The cleaning device also includes an external vessel configured to contain a second liquid and the inner vessel. The second liquid is acoustically ... | 09/26/2006 |
| 6965383 | Scaling persistence data with interpolation An oscilloscope apparatus for scaling and displaying persistence data using interpolation. The oscilloscope apparatus acquires a waveform and accumulates persistence data of the acquired waveform in a results buffer. The size of the persistence data is selectable by... | 11/15/2005 |
| 6744245 | Particle count correction method and apparatus A method is disclosed which allows more accurate counting of particles where the sample has significant size variability between particles. The method uses flight time and wait time to obtain a corrected count of particles. ... | 06/01/2004 |
| 6690760 | Unit counting device A counting device with control system includes a housing with a rotating wheel therein. The wheel includes a plurality of seats for each item to be counted. Upon deposit of the items into the housing, each item is seated for discharge through a housing ap... | 02/10/2004 |
| 6563901 | Multi-head counting system with size discrimination A counter unit counts discrete articles that are within a predetermined size range into lots having a predetermined number of articles. The counter unit includes (1) a first conveyor that delivers a flow of articles separated at discrete intervals; and (2... | 05/13/2003 |
| 6285730 | Dust/particle monitor The invention relates to dust/particle monitors, and particularly but not necessarily exclusively to a method of monitoring fine particles harmful to humans in working environments. Equipment and methods of detection are known but which have several disad... | 09/04/2001 |
| 6184983 | Method and apparatus for measuring turbidity A method of measuring turbidity includes irradiating specimen water with a light beam, using photoelectric conversion means for subjecting to photoelectric conversion the light scattered by fine particles in the specimen water, inputting a pulse signal as... | 02/06/2001 |
| 6061130 | Apparatus for determining the particle size distribution of a mixture An apparatus for determining the particle size distribution and for characterizing the particle shapes of a particle mixture has a metering device for classifying a particle mixture supplied in a particle stream to the apparatus. An optoelectronic measure... | 05/09/2000 |
| 6034769 | Method and device for counting and measuring particles A device for counting and measuring particles provides an analysis of the particle characteristics and includes a processing system 27, comprising a control subsystem 13, including a microprocessor subsystem 20 and a terminal devices 21, an analog-digital... | 03/07/2000 |
| 5828716 | Procedure for identifying the number of particles that are weakly luminescent The present invention relates to a procedure for counting faintly luminescent particles, and relates specifically to a procedure for counting cells and microorganisms marked with a colored or fluorescent stain or marker that selectively marks the microorg... | 10/27/1998 |
| 5768327 | Method and apparatus for optically counting discrete objects An object counter includes a feeding funnel having a frustroconical section, the narrow end of which is coupled to a substantially vertical feeding channel having a substantially rectangular cross section. A pair of linear optical sensor arrays are arrang... | 06/16/1998 |
| 5684584 | Apparatus for analyzing cells in urine The present invention relates to an apparatus for automatically analyzing cells in urine using flow cytometry. The present invention includes means for converting scattered-light signals indicative of individual cells in a urine specimen into correspondin... | 11/04/1997 |
| 5671262 | Method for counting and dispensing tablets, capsules, and pills There is provided a method for counting and dispensing pills, tablets, and capsules which depends on a simple vibrating, sloped, concave-shaped (e.g., V-shaped) trough, having a number of descending steps. The vibration of the trough is controlled and adj... | 09/23/1997 |
| 5619333 | Flow contamination monitor The invention relates to a portable on-line fluid contamination monitor. An inlet and an outlet are provided for connecting the monitor to a fluid control circuit and a measuring device is included for withdrawing fluid from the circuit. An optical sensor... | 04/08/1997 |
| 5583635 | Method of measuring particles and apparatus for the same The present invention provides a method of measuring particles and an apparatus for the same, which count only particles in liquid by distinguishing between the particles and bubbles in liquid. In order to fulfill the above requirements, in the present in... | 12/10/1996 |
| 5464752 | Automated analyzer for screening cells or formed bodies for enumeration of populations expressing selected characteristics A method and apparatus for automatically and rapidly, retrieving, counting and/or analyzing at least one selected white blood cell population and/or subset thereof of a whole blood sample or portion thereof. A volume of a biological sample containing the ... | 11/07/1995 |
| 5426501 | Apparatus and method for particle analysis Apparatus and a method are disclosed for determining the sizes of particles entrained in a fluid over a relatively wide range of sizes and determining the distribution of particles in a plurality of size increments. A sample of particles is fed into a dro... | 06/20/1995 |
| 5317645 | Method and apparatus for the recognition and counting of discrete objects An apparatus for counting discrete objects of various sizes and shapes as they travel through the apparatus in a disorderly flow. The apparatus includes a sensor array which comprises a plurality of photodetectors arranged in a linear fashion. The discret... | 05/31/1994 |
| 5309215 | Procedure for the determination of particle size distribution in particle mixtures A method for automatic particle size analysis of a particle mixture by linear, optoelectronic scanning of a separated particle stream. Particle chord length categories are counted and converted to a particle size distribution. The method takes into accoun... | 05/03/1994 |
| 5260192 | Method and apparatus for screening cells or formed bodies with populations expressing selected characteristics utilizing at least one sensing parameter A method and apparatus for automatically and rapidly, retrieving counting and/or analyzing at least one selected population of cells or formed bodies, such as a white blood cell population and at least one subset thereof of a whole blood sample or portion... | 11/09/1993 |
| 5098657 | Apparatus for measuring impurity concentrations in a liquid An apparatus for measuring nonvolatile residue concentrations in liquid is disclosed. A plurality of fixed and adjustable flow restrictive elements are utilized and arranged in-line from a fluid supply source to provide a constant, pressure controlled flo... | 03/24/1992 |
| 5090808 | Particle measurement apparatus A particle measurement apparatus is disclosed in which a laser beam is projected at a sample containing particles to be measured in a measurement zone and light scattered by particles in the sample is evaluated to thereby determine properties of particles... | 02/25/1992 |
| 5059395 | Particle analyzing apparatus In particle analysis applied to blood cells, use is made of a distinguishing parameter which is the ratio of pulse height to pulse width derived from individual pulses generated in response to detection of corresponding individual particles. The distribut... | 10/22/1991 |
| 5033095 | Scanning image analyzer for accumulating quantifiable contaminants of webs A microcomputer based digital analysis system is disclosed which includes a microcomputer and a flatbed optical scanner to analyze test sheets of paper fabricated from a batch of pulp to be tested. A keyboard is utilized by an operator to select one of a ... | 07/16/1991 |
| 5023054 | Blood filter and apparatus for hemorheological measurement A filter and filtering apparatus for measuring the deformability of a blood cell passing through a flow passage formed as a space between a surface of a groove formed in a first substrate and a surface of a second substrate with which the groove is sealed... | 06/11/1991 |
| 4938592 | Beam forming and sensing apparatus for aerodynamic particle sizing system Apparatus, intended primarily for use in an aerodynamic particle sizing system, for generating a pair of closely-spaced, substantially parallel light beams and for determining particle sizes by measuring the times of flight of particles between the two li... | 07/03/1990 |
| 4933884 | Method of and apparatus for determining threshold values for the analysis of particles contained in a liquid The apparatus for analyzing particles in a particle containing fluid, especially pretreated liquids containing blood samples, contains storage devices and computing sections for determining separation threshold values and the particle distribution as a fu... | 06/12/1990 |
| 4931963 | Self-diagnosis method for a bank note depositing and dispensing machine Diagnosis data for respective portions of an apparatus are collected from respective sensors provided on the apparatus at the respective portions thereof and stored in a memory for each of the respective portions. These diagnosis data are the amount of ch... | 06/05/1990 |
| 4893320 | Apparatus for counting particles attached to surfaces of a solid An apparatus for counting particles attached to surfaces of a solid is disclosed which includes an external tank, an internal tank disposed within the external tank for hermetically accommodating a measuring liquid into which a sample having particles att... | 01/09/1990 |
| 4871251 | Apparatus and method for particle analysis Apparatus for analyzing particles contained in a fluent edium (12). The apparatus includes a body (20) having a window (30), an optical source preferably comprising a laser diode (100) having a small light emitting area (140), and an optical system (102) ... | 10/03/1989 |
| 4778657 | Apparatus for determining the characteristics of particles suspended in liquids An apparatus for determining various characteristics of particles suspended in a liquid, e.g., the deformability or other values of red blood corpuscles. The particles are transported by a method similar to the Coulter method through a measuring channel h... | 10/18/1988 |
| 4765737 | Cell size measurements using light in flow cytometry and cell sorting In a flow cytometer where the laser beam is larger than the size of each biological cell of a column of cells being passed through the laser beam at a high rate wherein new and improved method and means are used to calculate the size of the cells as sense... | 08/23/1988 |
| 4747685 | Biological microparticle inspection apparatus A biological microparticle inspection apparatus has a reactor in which blood containing T cells is mixed with latex-labeled antibodies and T cells are coupled with the antibodies to form complexes. A particle size measurement unit is provided for measurin... | 05/31/1988 |
| 4710021 | Particulate matter analyzing apparatus and method A method and apparatus for jetting a measured volume of a suspension of particulates such as blood cells or colloids into a single fluid-primed incompletely partitioned transducer chamber in such a way that the dynamic relationship between the priming liq... | 12/01/1987 |
| 4683579 | Method and apparatus for measuring blood constituent counts Blood constituents such as red cells, white cells, and platelets are centrifuged into layers in a capillary tube and the true extent of one or more of the layers is measured photometrically. Each layer to be measured is optically scanned by a sequence of ... | 07/28/1987 |
| 4637719 | Optical measurement of marine conditions The apparatus provides a method of observing a water sample that is caused to flow rapidly past a beam of light of rectangular cross section. Attenuation of the beam by the sample is measured in a first detector that generates an output signal that has a ... | 01/20/1987 |