Issued Patents All Time
Showing 51–66 of 66 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6328213 | Method of processing an analog electrical signal containing information representative of reflected light from coded indicia, wherein the electrical signal contains edge transitions | Duanfeng He | 2001-12-11 |
| 6250551 | Autodiscrimination and line drawing techniques for code readers | Duanfeng He, Joseph Cai | 2001-06-26 |
| 6237053 | Configurable operating system having multiple data conversion applications for I/O connectivity | Allan Herrod, James R. Fuccello, Donald E. Schafer, Steven Kramp, Duanfeng He +1 more | 2001-05-22 |
| 6234397 | Techniques for reading two dimensional code, including maxicode | Duanfeng He, Kevin Hunter | 2001-05-22 |
| 6176428 | Techniques for reading postal code | Duanfeng He | 2001-01-23 |
| 6095418 | Apparatus for processing symbol-encoded document information | Jerome Swartz, Raj Bridgelall, Ron Goldman, Joseph Katz | 2000-08-01 |
| 6088482 | Techniques for reading two dimensional code, including maxicode | Duanfeng He, Kevin Hunter | 2000-07-11 |
| 6005255 | Timing synchronization for image scanning | — | 1999-12-21 |
| 5959286 | Method and apparatus for raster scanning of images | Paul Dvorkis, Jim Li | 1999-09-28 |
| 5889269 | Linearization of raster patterns in 2D optical scanners | Raj Bridgelall, Duanfeng He, William Sakoda | 1999-03-30 |
| 5821522 | Optical scanner with high speed zoom capability | Yajun Li | 1998-10-13 |
| 5767496 | Apparatus for processing symbol-encoded credit card information | Jerome Swartz, Joseph Katz | 1998-06-16 |
| 5710417 | Bar code reader for reading both one dimensional and two dimensional symbologies with programmable resolution | Yajun Li, Duanfeng He, Joseph Katz, Jerome Swartz | 1998-01-20 |
| 5637853 | Reading indicia by analysis of different light reflecting portions based on signal-to-noise ratios | — | 1997-06-10 |
| 5504318 | Analog waveform decoder using peak locations | Theodosios Pavlidis | 1996-04-02 |
| 5311001 | Analog waveform decoder utilizing histogram of edge sizes | Theodosios Pavlidis | 1994-05-10 |