Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5908191 | Double-document detection arrangement | Zhongtai Chen, Ronald G. Shell, Michael Spall | 1999-06-01 |
| 5671919 | Double-document detection arrangement | Zhongtai Chen, Ronald G. Shell, J. Michael Spall | 1997-09-30 |
| 5509648 | Document separation/detection technique | Zhongtai Chen, Ronald G. Shell, J. Michael Spall | 1996-04-23 |
| 5439506 | Separation process for a check processor | Zhongtai Chen, Ronald G. Shell, J. Michael Spall | 1995-08-08 |
| 5437375 | Double-document detection systems | Zhongtai Chen, Ronald G. Shell, J. Michael Spall | 1995-08-01 |
| 5419546 | Double-document detection arrangement | Zhongtai Chen, Ronald G. Shell, J. Michael Spall | 1995-05-30 |