Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6612684 | Method for determining a printer's signature to provide proof that the printer printed a particular document | Donald G. Mackay, Robert A. Cordery | 2003-09-02 |
| 6533385 | Method for determining a printer's signature and the number of dots per inch printed in a document to provide proof that the printer printed a particular document | Donald G. Mackay, Robert A. Cordery, Hugh L. Brunk | 2003-03-18 |