Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5909709 | Stackable stamps | Suk Ku An, Norman D. Siegfried | 1999-06-08 |
| D399110 | Crimper | William J. Schulz, Jeffery S. Kunkler, Craig A. Fluegge | 1998-10-06 |
| D392537 | Rotary blade actuator | William J. Schulz | 1998-03-24 |
| 5711077 | Double blade actuator for a hand held cutter blade assembly | William J. Schulz | 1998-01-27 |
| D384817 | Ferrule for a paint brush | Gunar Narubin | 1997-10-14 |