Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D309246 | Screwdriver | Steven S. Cascio, Donald J. Caldwell, Tom S. Severson, Steven R. Wente | 1990-07-17 |
| D307236 | Screwdriver | Steven S. Cascio, Donald J. Caldwell, Tom S. Severson, Steven R. Wente | 1990-04-17 |
| 4777852 | Ratcheting screwdriver | Timm Herman, Donald J. Caldwell, Allan J. Bliemeister, Eric T. Gustafson | 1988-10-18 |
| D292893 | Timing light | Donald W. Doman, David R. Ellingen, Gene P. Hopp, Keith R. Malek, Steven E. Michalski +4 more | 1987-11-24 |