Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9342908 | Information retrieval and presentation methods and systems | Christian Hirsch, John Hosking | 2016-05-17 |
| 5711673 | Method for interpreting a plurality of response marks on a scannable surface | — | 1998-01-27 |
| 5420407 | Adjustable read level threshold for optical mark scanning | — | 1995-05-30 |