Class 356/423 - Disk

Subclass of Class 356 - Optics: measuring and testing
Definition: Subject matter wherein the surfaces are disks or sectors
No. of patents: 24
Last issue date: 12/04/2007

Number	Title	Issue Date
7304732	Microelectromechanical resonant photoacoustic cell An integrated photoacoustic spectroscopy (PAS) cell is fabricated using microelectromechanical (MEMS) techniques. The multi-layer structure includes an inner layer with a patterned resonant cavity disposed between top and bottom outer layers and a microphone acousti...	12/04/2007
7240839	Color measurement apparatus operable as a pointing device, a computer display measurement device and a printer output measurement device A color measurement apparatus is adapted as an attachment for a personal computing system. An interface integral to the color measurement apparatus couples the color measurement apparatus to the personal computing system. A computer pointing device integral to the c...	07/10/2007
7034943	Gas sensors The present invention relates to a device for accomplishing noise reduction in a photoacoustic gas detector using a sound damping element and/or a background or reference microphone where a preferably larger external volume that acts as a sound damping element (SDE)...	04/25/2006
6954267	Device for measuring surface defects In view of the miniaturization of semiconductor components, the prevention of particles and other defects on the wafer surface during production is of great importance. The inspection should proceed as process-oriented as possible. For this purpose, devices are need...	10/11/2005
6271920	Methods and apparatus for color calibration and verification Methods and apparatus for calibrating a color measuring instrument with a color standard and verifying the color standard and calibration are provided. One method includes providing a color standard having a surface with at least two different colors (pre...	08/07/2001
6139325	Device for determining color combinations A device for determining aesthetically harmonious color combinations includes a color selector wheel rotatably attached to a base having a plurality of distinct color selection groups disposed beyond and surrounding the periphery of the color selection wh...	10/31/2000
6067504	Method for correctly identifying hair color Methods and apparatus for determining accurate hair color classificatinos and appropriate coloring agents to bring about a selected change of color include a table of hair color classifications, a color measuring instrument to arrive at Hunter L, a and b ...	05/23/2000
5875027	Sensitivity calibration disk for surface defect tester A calibration disk for calibrating a sensitivity of a surface defect tester, according to the present invention, comprises n (n is an integer equal to or larger than 2) false defect rows each including 3 or more false defects each formed in a radial or pe...	02/23/1999
5717605	Color classification apparatus The present invention provides a simple, low-cost color classification apparatus having a high resistance to mechanical vibrations and capable of properly performing color classification even if a light source is not specified and its spectrum changes. A ...	02/10/1998
5526120	Test strip with an asymmetrical end insuring correct insertion for measuring For measuring an analyte in a liquid, a test strip and apparatus each have an asymmetry. The asymmetries combine to permit a test strip to be inserted into the apparatus when it is correctly aligned but prevent the test strip from being fully inserted if ...	06/11/1996
5515170	Analyte detection device having a serpentine passageway for indicator strips An apparatus comprising a passageway for accepting a strip for determining the presence or quantity of an analyte is provided. The passageway has a serpentine shape to maintain the strip against an optical aperture in the passageway wall, insuring that a ...	05/07/1996
5452081	Texture matching device Visual inspection device for inspecting the finish on manufactured goods. A plurality of samples are joined together in a substantially flat, substantially disk-like shape for easy viewing. The device includes a viewing hole in the center so that the surf...	09/19/1995
5402362	Method of utilize trial dyeings to improve color formulations For a given set of dyes, chosen to match a target (standard) color, by combining the a priori percent reflectance and concentration data of primary (calibration) dyeings with that of one or more trial dyeings, a calculated formulation can be obtained whic...	03/28/1995
5231576	Measuring apparatus The present invention is an apparatus for measuring the constituent concentration of a specimen on the basis of the color change in a test material housed in a test piece, which has reacted because of the specimen. The apparatus irradiates the test materi...	07/27/1993
5160979	Test piece coloration comparative decision unit An apparatus is provided for making color comparisons between a test sample and a plurality of color samples. The color samples are arranged on a circle on a rotatable member and are successively moved into position adjacent a test sample. When an operato...	11/03/1992
5160980	Test piece coloration comparative decision unit An apparatus is provided for making color comparisons between a test sample and a plurality of color samples. The color samples are arranged on a circle on a rotatable member and are successively moved into position adjacent a test sample. When an operato...	11/03/1992
5011290	Test sample color comparison device A test sample color comparison device is disclosed which has a casing unit with an insertion slot for inserting a color test sample therein, and a display section for displaying the color test sample adjacent at least one of a plurality of reference color...	04/30/1991
4989983	Test sample color comparison device A test sample color comparison device is disclosed which has a casing unit with an insertion slot for inserting a color test sample therein, and a display section for displaying the color test sample adjacent at least one of a plurality of reference color...	02/05/1991
4984895	Color comparison device having a bulged insertion groove for holding a test stick in a flexed condition A color comparison device comprises a casing unit having a comparison window for displaying a comparison color sample section mounted on a rotatable wheel and a test stick insertion groove portion formed in an upper surface of the casing unit at one end t...	01/15/1991
4981361	Color comparison device having a color sample-bonding wheel which permits easy removal of a color sample sticker A color comparison device uses a rotatable color sample-bonding wheel to hold a sticker containing a plurality of color shades for matching with a color of a test portion of a test stick as the wheel rotates. At least one recess is formed in a part of the...	01/01/1991
4966461	Color identification system A hue compass has triplet numerical values assigned to colors so that every possible color is identified with a unique triplet color identification number which represents the percentages of each primary color component present. Triplet values 100/0/0, 0/...	10/30/1990
4871258	Color test meter A colorimeter comprises a case, a liquid crystal display (LCD) mounted on the case, a color chart provided on the case to permit holding of a specimen to be compared in close proximity to the color chart, and switches for indicating which color on the col...	10/03/1989
4112594	Color coordinating implement An implement for coordinating the colors of fabric and the like comprises a circular base portion of cardboard or other stable sheet material having therein a series of circular openings which are arranged in a circle concentric with the base member. Each...	09/12/1978
3967212	Flash lamp pumped dye laser An optical cavity for a flash lamp pumped dye laser including a pumping cavity, a birefringent filter and a plurality of frequency doubling crystals. Within the pumping cavity the flash lamp is cooled by forced air convection and operated with a D.C. simm...	06/29/1976

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Class 356/423 - Disk