Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6434109 | Machine-readable optical disc with reading-inhibit agent | Philip E. Rollhaus, John R. Powell, Eric J. Carlson, Daniel J. Ehntholt, Irwin C. Winkler +1 more | 2002-08-13 |
| 6343063 | Machine-readable optical disc with reading-inhibit agent | Philip E. Rollhaus, John R. Powell, Eric J. Carlson, Daniel J. Ehntholt, Irwin C. Winkler +1 more | 2002-01-29 |