| 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 |