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Browse by Category: Main > Electrical & Energy
Class Information
Number: 250/559.2
Name: Radiant energy > Photocells; circuits and apparatus > With circuit for evaluating a web, strand, strip, or sheet > Measuring dimensions > With comparison to reference or standard
Description: Subject matter wherein evaluation of the material includes comparing the circuit output to a reference or stored value.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8610096 Charged particle beam writing apparatus and method Dec. 17, 2013
8405613 Optimization of statistical movement measurement for optical mouse, with particular application to laser-illuminated surfaces Mar. 26, 2013
8119964 Safety device for a press brake type of machine Feb. 21, 2012
7718938 Spatial information detection system including a plurality of detection devices with nonoverlapping light projection periods May. 18, 2010
7650019 Method for the early identification of a deviation in the printed images that have been created by a printing press during continuous production Jan. 19, 2010
7578068 Detecting apparatus for workpiece Aug. 25, 2009
7439534 Reflected light intensity ratio measuring device, device for measuring light energy absorption ratio and heat treatment apparatus Oct. 21, 2008
7423269 Automated feature analysis with off-axis tilting Sep. 9, 2008
7385214 System and method for correcting systematic error of, and calibrating for, tilt angle of surface topology sensor head having plurality of distance sensors Jun. 10, 2008
7385215 Sensor elements for supercavitating vehicles Jun. 10, 2008
7245386 Object measuring device and associated methods Jul. 17, 2007
7046377 Method for determining corresponding points in three-dimensional measurement May. 16, 2006
6994432 Early transparency detection routine for inkjet printing Feb. 7, 2006
6885466 Method for measuring thickness of oxide film Apr. 26, 2005
6875993 Systems and methods for optically detecting and identifying objects in an environment Apr. 5, 2005
6768544 Method and a system for detecting impurities in a transparent material Jul. 27, 2004
6759669 Multi-point distance measurement device Jul. 6, 2004
6655005 Magnetic head positioning apparatus using boundary line detecting method Dec. 2, 2003
6640716 Imaging print media Nov. 4, 2003
6492651 Surface scanning system for selective deposition modeling Dec. 10, 2002
6477265 System to position defect location on production wafers Nov. 5, 2002
6452150 Cassette measuring system Sep. 17, 2002
6437355 Apparatus for judging whether bump height is proper or not Aug. 20, 2002
6285034 Inspection system for flanged bolts Sep. 4, 2001
6049625 Method of and an apparatus for 3-dimensional structure estimation Apr. 11, 2000
6026172 System and method for zoom lens calibration and method using same Feb. 15, 2000
5877506 Method and device for monitoring blanks or revenue seals for cigarette packages Mar. 2, 1999
5866915 Method and apparatus for electro optically determining the dimension, location and attitude of objects Feb. 2, 1999
5793051 Method for obtaining three-dimensional data from semiconductor devices in a row/column array and control of manufacturing of same with data to eliminate manufacturing errors Aug. 11, 1998
5747822 Method and apparatus for optically digitizing a three-dimensional object May. 5, 1998
5714762 Determination of the surface properties of an object Feb. 3, 1998
5693953 Method and apparatus for electro optically determining the dimension, location and attitude of objects Dec. 2, 1997
5693933 Device for dtecting the size of an original document in a document reader Dec. 2, 1997
5607800 Method and arrangement for characterizing micro-size patterns Mar. 4, 1997
5602399 Surface position detecting apparatus and method Feb. 11, 1997
5581354 Method and device for thickness assessment Dec. 3, 1996
5564846 Printer with sheet positioning marks control Oct. 15, 1996
5483893 Control system and method for automatically identifying webs in a printing press Jan. 16, 1996
5286980 Product discrimination system and method therefor Feb. 15, 1994
5172001 System to automatically compensate the transversal oscillation of the scanning plane in a laser scanner used for profile measurement using reference element Dec. 15, 1992
5142160 Method and device for determining the volume of an object on a flat background Aug. 25, 1992
5142142 Portable device for detecting short duration energy pulses Aug. 25, 1992
5138179 Method of and device for diameter measurement used in automatically controlled crystal growth Aug. 11, 1992
5015867 Apparatus and methods for measuring the diameter of a moving elongated material May. 14, 1991
5010247 Method of classifying objects according to shape Apr. 23, 1991
5000575 Method of fabricating gradient index optical films Mar. 19, 1991
4994990 Micro-dimensional measurement apparatus Feb. 19, 1991
4982102 Apparatus for detecting three-dimensional configuration of object employing optical cutting method Jan. 1, 1991
4977331 Method of and apparatus for detecting the degree of filling of supply spools on a spinning or twisting frame Dec. 11, 1990
4967093 Deformation measuring method and device using cross-correlation function between speckle patterns with reference data renewal Oct. 30, 1990

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