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Class Information
Number: 250/568
Name: Radiant energy > Photocells; circuits and apparatus > Optical or pre-photocell system > Including coded record > Digital information
Description: Subject matter where the date consist of discrete identical indicia and is represented by the relative positional locations of the indicia on the record.










Sub-classes under this class:

Class Number Class Name Patents
250/569 Card type 50
250/570 Tape, drum, or disc types 97


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
6891182 Apparatus for automatically detecting size to be detected and automatic analyzer using the same May. 10, 2005
6849860 Detection system and a detection method Feb. 1, 2005
6774374 Isolation mounts for use with vacuum chambers and their application in lithographic projection apparatuses Aug. 10, 2004
6618132 Miniature laser tracker Sep. 9, 2003
RE37925 High speed imaging apparatus for CCD based scanners Dec. 10, 2002
6465787 Covert surveillance system for tracking light sensitive tagged moving vehicles Oct. 15, 2002
6410931 Electro-optical reader with hands-free and hand-held modes of operation Jun. 25, 2002
6225641 Optical reader for scanning optical indicia by movement of an aperture relative to an image plane May. 1, 2001
6177683 Portable viewer for invisible bar codes Jan. 23, 2001
6073851 Multi-focus optical reader with masked or apodized lens Jun. 13, 2000
6060722 Optical reader having illumination assembly including improved aiming pattern generator May. 9, 2000
6042012 Method and apparatus for reading images without need for self-generated illumination source Mar. 28, 2000
6021946 Self-focusing bar code reader and optical receiving system Feb. 8, 2000
6017125 Bar coded retroreflective target Jan. 25, 2000
5991102 Beam protecting device Nov. 23, 1999
5969323 Noise-reduced electro-optical readers with optical bandpass filter Oct. 19, 1999
5945670 Optical system for data reading having large depth of field Aug. 31, 1999
5814802 High speed imaging apparatus for CCD based scanners Sep. 29, 1998
5814803 Image reader with multi-focus lens Sep. 29, 1998
5777311 Optoelectronic a device employing a digital filter which operates in different coefficient sets Jul. 7, 1998
5770847 Bar code reader with multi-focus lens Jun. 23, 1998
5744790 Split optics focusing apparatus for CCD-based bar code scanner Apr. 28, 1998
5717221 Multiple laser indicia reader optionally utilizing a charge coupled device (CCD) detector and operating method therefor Feb. 10, 1998
5696370 Bar code scanning system for automatically calculating the optical power output levels of the light source Dec. 9, 1997
5693929 Scanning module with spring made resistant to overflexing Dec. 2, 1997
5691534 Digital signal ouput device having a transparent gear wheel Nov. 25, 1997
5641958 Optical system for data reading having wide range of focus Jun. 24, 1997
5598007 Symbology reader with fixed focus spotter beam Jan. 28, 1997
5585616 Camera for capturing and decoding machine-readable matrix symbol images applied to reflective surfaces Dec. 17, 1996
5576531 Hand held bar code scanning device having a manually operated optical trigger switch Nov. 19, 1996
5541397 Hand held bar code scanning device having a manually operated optical trigger switch Jul. 30, 1996
5541419 Symbology reader wth reduced specular reflection Jul. 30, 1996
5507527 Two dimensional code for processing data Apr. 16, 1996
5506411 Optical reader with improved response to change in reflected signal Apr. 9, 1996
5498868 Optical data reader capable of quickly changing a condensing position of a light beam Mar. 12, 1996
5491346 Anamorphic lens system for a hand-held symbology reader Feb. 13, 1996
5479026 System having optically encoded information Dec. 26, 1995
5479164 Photonic data compression system and method Dec. 26, 1995
5479011 Variable focus optical system for data reading Dec. 26, 1995
5404009 Integrated optical information detector for an optical information processing apparatus with a plurality of photo detecting strips and a common bonding pad Apr. 4, 1995
5376780 Method of and arrangement for reading a bar code on photographic material Dec. 27, 1994
5347121 Variable focus optical system for data reading Sep. 13, 1994
5345089 System and method for optical scanner sensitivity adjustment Sep. 6, 1994
5332892 Optical systems for bar code scanners Jul. 26, 1994
5321436 Franking machine with means for checking operation of printing elements Jun. 14, 1994
5317166 A system for decoding bar coded labels upon different size containers May. 31, 1994
5298728 Signal processing apparatus and method Mar. 29, 1994
5291028 Optical device for sensing marks on a surface using green light impinging at least sixty-five degrees to the normal Mar. 1, 1994
5260554 System for automatically reading symbols, such as bar codes, on objects which are placed in the detection zone of a symbol reading unit, such as a bar code scanner Nov. 9, 1993
5237161 System for automatically reading symbols, such as bar codes, on objects which are placed in the detection zone of a symbol reading unit, such as a bar code scanner Aug. 17, 1993

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