Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5548110 | Optical error-detecting, error-correcting and other coding and processing, particularly for bar codes, and applications therefor such as counterfeit detection | Ernst van Haagen | 1996-08-20 |
| 5367148 | Counterfeit detection using ID numbers with at least one random portion | Ernst van Haagen | 1994-11-22 |
| 5283422 | Information transfer and use, particularly with respect to counterfeit detection | Ernst van Haagen | 1994-02-01 |
| 5088093 | Self-correcting registers, error-detecting/correcting registers, and inversion coding using one bit, and other information storage media | Ernst van Haagen | 1992-02-11 |
| 4814589 | Information transfer and use, particularly with respect to objects such as gambling chips | Ernst van Haagen | 1989-03-21 |
| 4642624 | Width card | Robert Hotto | 1987-02-10 |