Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6977052 | Check disk for optical data storage disk manufacturing | Barry Brovold, Donald J. Kerfeld | 2005-12-20 |
| 6638692 | Replicated regions on optical disks | Anthony O. Banal, Kristi L. Chavez, Donald J. Kerfeld, Chad R. Sandstrom | 2003-10-28 |
| 5946286 | Customized graphics for dual layer optical discs | — | 1999-08-31 |
| 5607188 | Marking of optical disc for customized identification | Bruce T. Peacock | 1997-03-04 |