Issued Patents 2002
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |