Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6783991 | Reversible and reusable authentication system for secure documents | Steven L. Yeager | 2004-08-31 |
| 6733867 | Heat-transferable security stamp | William F. Pinell, Harry Allen Seifert, John M. Harden | 2004-05-11 |
| 6692819 | Method of transparentizing a cellulose substrate | William J. Castle | 2004-02-17 |
| 6686014 | Reduction of adhesive ooze by pattern overcoating | David E. Washburn, Stephen D. Webendorfer, David F. Laurash | 2004-02-03 |