Inventor
CHECK FRANK
US24 patents
Patents
24 patentsUS6758402B1Jul 6, 2004
Bioptical holographic laser scanning system
METROLOGIC INSTR INC131 citations99
US7051922B2May 30, 2006
Compact bioptical laser scanning system
METROLOGIC INSTR INC20 citations93
US6991167B2Jan 31, 2006
Bioptical laser scanning system providing 360° of omnidirectional bar code symbol scanning coverage at a point of sale (POS) station
METROLOGIC INSTR INC18 citations93
US6530522B1Mar 11, 2003
Holographic laser scanning system having multiple laser scanning stations for producing a 3-D scanning volume substantially free of spatially and temporally coincident scanning planes
METROLOGIC INSTR INC13 citations93
US6158659ADec 12, 2000
Holographic laser scanning system having multiple laser scanning stations for producing a 3-D scanning volume substantially free of spatially and temporally coincident scanning planes
METROLOGIC INSTR INC23 citations93
US7534994B2May 19, 2009
Laser scanning system employing laser mode switching using a binary mode switching signal
METROLOGIC INSTR INC10 citations84
US7407103B2Aug 5, 2008
Bioptical holographic laser scanning system
METROLOGIC INSTR INC16 citations84
US7395968B2Jul 8, 2008
Laser scanning based bar code symbol reading system for producing a 3-D scanning volume substantially free of spatially and temporally coincident laser scanning planes
METROLOGIC INSTR INC10 citations84
US6581835B1Jun 24, 2003
Method of and system for scanning bar code symbols using a laser scanning pattern having multiple focal zones, wherein the minimum beam dimension/minimum bar width (mbd/mbw) ratio is greater than or equal to 2.0
METROLOGIC INSTR INC11 citations82
US6481625B2Nov 19, 2002
Laser scanning bar code symbol reader employing variable pass-band filter structures having frequency response characteristics controlled by time-measurement of laser-scanned bar code symbol
METROLOGIC INSTR INC11 citations82
US7207492B2Apr 24, 2007
Laser scanning bar code symbol reader employing variable passband filter structures having frequency response characteristics controlled by time-measurement of laser-scanned bar code symbol elements
METROLOGIC INSTR INC4 citations74
US7152796B2Dec 26, 2006
Bar code symbol scanning system having multiple scanning stations for producing a 3-D scanning volume free of substantially and temporally coincident scanning planes
METROLOGIC INSTR INC6 citations74
US6840449B2Jan 11, 2005
Laser scanning system having multiple laser scanning stations for producing a 3-D scanning volume substantially free of spatially and temporally coincident scanning planes
METROLOGIC INSTR INC10 citations74
US6686586B2Feb 3, 2004
Diffractive-based laser scanning system employing microcontroller programmed for mode-switching correction in response to binary mode switching signal generation
METROLOGIC INSTR INC5 citations74
US6588663B1Jul 8, 2003
Multi-focal laser scanning bar code symbol reading system employing a scan data signal processor having a variable pass-band filter structure with frequency characteristics controlled by measuring the beam spot speed of the laser scanning beam producing the analog scan data signal being processed by said scan data signal processor
METROLOGIC INSTR INC8 citations74
US6540139B1Apr 1, 2003
Multi-focal laser scanning bar code symbol reading system employing a variable second derivative signal pass-band filter structure having frequency characteristics that are controlled in a real-time manner by detecting bar code elements in analog scan data signals produced by said system
METROLOGIC INSTR INC4 citations74
US6499661B1Dec 31, 2002
Multi-focal laser scanning bar code symbol reading system employing a scan data signal processor having a variable pass-band filter structure with frequency characteristics controlled by detecting the focal distance of the laser scanning beam producing the analog scan data signal being processed by said data signal processor
METROLOGIC INSTR INC4 citations74
US6422467B2Jul 23, 2002
Reading system a variable pass-band
METROLOGIC INSTR INC5 citations74
US6616040B1Sep 9, 2003
Analog scan data signal processor employing a time-domain substrate noise filter for non-linearly processing analog scan data signals and reducing substrate noise signal levels therein prior to first derivative signal generation and processing operations carried out within said analog scan data signal processor
METROLOGIC INSTR INC10 citations73
US6572018B1Jun 3, 2003
Method of and apparatus for processing analog scan data signals derived by scanning bar code symbols using a laser beam, wherein a real-time bar code element detector is used to control the detection of zero-crossings occurring in the second derivative of said analog scan data signals
METROLOGIC INSTR INC10 citations73
US6354505B1Mar 12, 2002
Scan data signal processor employing pass-band filter structures having frequency response characteristics dynamically switched into operation by control signals indicative of the focal zone of the laser beam during bar code symbol scanning
METROLOGIC INSTR INC6 citations73
US7227115B2Jun 5, 2007
Method of and system for detecting and correcting mode switching in diffractive-based laser scanning systems
METROLOGIC INSTR INC4 citations63
US6494377B1Dec 17, 2002
Method of and apparatus for processing analog scan data signals derived while scanning a bar code symbol using a laser beam, wherein the detected beam spot speed of said laser beam is used to dynamically switch into operation optimal pass-band filtering circuits
METROLOGIC INSTR INC6 citations63
US6527186B1Mar 4, 2003
Scan data signal processor employing band-pass filter having frequency response characteristics controlled by the depth of focus of the laser scanning beam
METROLOGIC INSTR INC3 citations62