| 12198474 |
Voter and voting official authenticatable ballot and method |
Noal Phillips |
2025-01-14 |
| 11978286 |
Voter and voting official authenticatable ballot and method |
Noal Phillips |
2024-05-07 |
| 8100562 |
Device and system for an optical element holder |
Michael Robert Gluszczak, Paul O. Ramstad, Stephen D. Smithson, Roy W. Lindahl |
2012-01-24 |
| 7740378 |
Device and system for an optical element holder |
Michael Robert Gluszczak, Paul O. Ramstad, Stephen D. Smithson, Roy W. Lindahl |
2010-06-22 |
| 7625613 |
Copy-resistant security paper |
Noal Phillips |
2009-12-01 |
| 6709018 |
Security envelope detectable for foreign substances |
— |
2004-03-23 |
| 6692030 |
Security document with nano-pattern |
— |
2004-02-17 |
| 6665406 |
Variable density verification |
— |
2003-12-16 |
| 6396927 |
Variable density verification |
— |
2002-05-28 |
| 6106021 |
Security papers with unique relief pattern |
— |
2000-08-22 |
| 6082775 |
Chemically encoded security papers |
— |
2000-07-04 |
| 5873604 |
Document security system having thermo-activated pantograph and validation mark |
— |
1999-02-23 |
| 5826916 |
Visual validation mark for bank checks and other security documents |
— |
1998-10-27 |
| 5772248 |
Document with tamper and counterfeit resistant relief markings |
— |
1998-06-30 |
| 5762378 |
Tamper resistant validation marks |
— |
1998-06-09 |
| 5704651 |
Counterfeit resistant documents and methods |
— |
1998-01-06 |
| 5695220 |
Visual validation mark for bank checks and other security documents |
— |
1997-12-09 |
| 5344192 |
Visual validation mark for bank checks and other security documents |
— |
1994-09-06 |