Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6223988 | Hand-held bar code reader with laser scanning and 2D image capture | Donald G. Chandler | 2001-05-01 |
| 6116744 | Method and apparatus for illuminating retroreflective and other objects | — | 2000-09-12 |
| 5856844 | Method and apparatus for determining position and orientation | Donald G. Chandler, Robert H. Dunphy | 1999-01-05 |
| 5832139 | Method and apparatus for determining degrees of freedom of a camera | Donald G. Chandler, Robert H. Dunphy | 1998-11-03 |
| 5512739 | Dual processor omnidirectional bar code reader with dual memory for bar code location and orientation | Donald G. Chandler | 1996-04-30 |
| 5378883 | Omnidirectional wide range hand held bar code reader | Donald G. Chandler | 1995-01-03 |
| 5296690 | System for locating and determining the orientation of bar codes in a two-dimensional image | Donald G. Chandler | 1994-03-22 |
| 5262623 | Method and apparatus for distinguishing a preferred bar code or the like | Donald G. Chandler | 1993-11-16 |
| 5223701 | System method and apparatus using multiple resolution machine readable symbols | Donald G. Chandler | 1993-06-29 |
| 5189292 | Finder pattern for optically encoded machine readable symbols | Donald G. Chandler | 1993-02-23 |
| 5155343 | Omnidirectional bar code reader with method and apparatus for detecting and scanning a bar code symbol | Donald G. Chandler | 1992-10-13 |
| 5153418 | Multiple resolution machine readable symbols | Donald G. Chandler | 1992-10-06 |
| 5124537 | Omnidirectional bar code reader using virtual scan of video raster scan memory | Donald G. Chandler | 1992-06-23 |
| 4998010 | Polygonal information encoding article, process and system | Donald G. Chandler, Govind Shah | 1991-03-05 |
| 4896029 | Polygonal information encoding article, process and system | Donald G. Chandler, Govind Shah | 1990-01-23 |
| 4874936 | Hexagonal, information encoding article, process and system | Donald G. Chandler, Govind Shah | 1989-10-17 |
| 4587448 | Signal transition detection circuit | — | 1986-05-06 |
| 4553042 | Signal transition enhancement circuit | — | 1985-11-12 |
| 4523221 | TV Receiver circuitry for performing chroma gain, auto-flesh control and the matrixing of I and Q signals to (R-Y), (B-Y) and (G-Y) signals | Danny Chin, Thomas V. Bolger | 1985-06-11 |
| 4494214 | Apparatus for generating scaled weighting coefficients for sampled data filters | Francis Bernard, Steven Eliscu | 1985-01-15 |