Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7303134 | Lottery game tickets and methods for making same | Michael A. Ehrhart, Robert M. Hussey, Todd A. Dueker, Cayetano Sanchez, III, Walter Szrek +4 more | 2007-12-04 |
| 6752319 | Lottery game tickets and methods for making same | Michael A. Ehrhart, Robert M. Hussey, Todd A. Dueker, Cayetano Sanchez, III, Walter Szrek +4 more | 2004-06-22 |
| 6419157 | Methods for processing security documents | Michael A. Ehrhart, Robert M. Hussey, Todd A. Dueker, Cayetano Sanchez, III, Walter Szrek +4 more | 2002-07-16 |
| 6186404 | Security document voiding system | Michael A. Ehrhart, Robert M. Hussey, Todd A. Dueker, Cayetano Sanchez, III, Walter Szrek +4 more | 2001-02-13 |