| 7510118 |
Bar code symbol scanning system employing time-division multiplexed laser scanning and signal processing to avoid optical cross-talk and other unwanted light interference |
Joseph Ralph |
2009-03-31 |
| 7383996 |
Bioptical laser scanner for six-sided 360° POS-based scanning |
Timothy Good, Joseph Ralph |
2008-06-10 |
| 7207492 |
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 |
Frank Check, C. Harry Knowles, Xiaoxun Zhu, LeRoy Dickson |
2007-04-24 |
| 7195167 |
Modular omnidirectional bar code symbol scanning system with at least one service port for removable installation of scan module insert |
Timothy Good, Mark S. Schmidt, Matt Jefferson |
2007-03-27 |
| 7083102 |
Bioptical laser scanner for six-sided 360° Pos-based scanning |
Timothy Good, Joseph Ralph |
2006-08-01 |
| 6969004 |
Bar code symbol scanning system employing time-division multiplexed laser scanning and signal processing to avoid optical cross-talk and other unwanted light interference |
Joseph Ralph |
2005-11-29 |
| 6874690 |
Modular omnidirectional bar code symbol scanning system with at least one service port for removable installation of scan module insert |
Timothy Good, Mark S. Schmidt, Matt Jefferson |
2005-04-05 |
| 6830190 |
Multipath scan data signal processor having multiple signal processing paths with different operational characteristics to enable processing of signals having increased dynamic range |
Joseph Ralph |
2004-12-14 |
| 6616040 |
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 |
Frank Check, C. Harry Knowles, Xiaoxun Zhu |
2003-09-09 |
| 6588663 |
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 |
Frank Check, C. Harry Knowles, Xiaoxun Zhu, LeRoy Dickson |
2003-07-08 |
| 6581835 |
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 |
Frank Check, C. Harry Knowles, Xiaoxun Zhu, LeRoy Dickson |
2003-06-24 |
| 6572018 |
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 |
Frank Check, C. Harry Knowles, Xiaoxun Zhu |
2003-06-03 |
| 6540139 |
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 |
Frank Check, C. Harry Knowles, Xiaoxun Zhu, LeRoy Dickson |
2003-04-01 |
| 6527186 |
Scan data signal processor employing band-pass filter having frequency response characteristics controlled by the depth of focus of the laser scanning beam |
Frank Check, C. Harry Knowles, Xiaoxun Zhu |
2003-03-04 |
| 6499661 |
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 |
Frank Check, C. Harry Knowles, Xiaoxun Zhu, LeRoy Dickson |
2002-12-31 |
| 6494377 |
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 |
Frank Check, C. Harry Knowles, Xiaoxun Zhu |
2002-12-17 |
| 6481625 |
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 |
Frank Check, C. Harry Knowles, Xiaoxun Zhu, LeRoy Dickson |
2002-11-19 |
| 6422467 |
Reading system a variable pass-band |
Frank Check, C. Harry Knowles, Xiaoxun Zhu, LeRoy Dickson |
2002-07-23 |
| 6354505 |
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 |
C. Harry Knowles, Xiaoxun Zhu |
2002-03-12 |