Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7818941 | Plastic sheet barrier enclosure, system, and method | Christopher F. Freudenberg, William J. Freudenberg, David E. LeVasseur, Curtis L. Larson, John Harrison | 2010-10-26 |
| 5721041 | Art reproduction and method | — | 1998-02-24 |
| 5503325 | Pretaped container blanks | Thomas L. Nelson, John R. David, Curtis L. Larson, Norbert E. Wrobel | 1996-04-02 |
| 5465900 | Pretaped container blanks | John R. David, Curtis L. Larson, Thomas L. Nelson, Norbert E. Wrobel | 1995-11-14 |
| 4704163 | Printing ink | Donald J. David, Bernard S. Truskolaski, Maan-Shi S. Wu | 1987-11-03 |
| RE30891 | Resilient wood replication | — | 1982-03-30 |