Patents per Year
Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| D398865 | Protractor and drawing template | Charles W. Dietterich, Brett Wilson, Richard A. Tarozzi | 1998-09-29 | |
| D398864 | Ruler and drawing template | Charles W. Dietterich, Brett Wilson, Richard A. Tarozzi | 1998-09-29 | |
| D398250 | Ruler and drawing stencil | Charles W. Dietterich, Brett Wilson, Richard A. Tarozzi | 1998-09-15 | |
| D396422 | Ruler with drawing curves | Charles W. Dietterich, Brett Wilson, Richard A. Tarozzi | 1998-07-28 | |
| 5204389 | Sealed containers and sealing compositions for them | Robert H. Hofeldt | 1993-04-20 | $3,369,000 |
| 5106886 | Sealed containers and sealing compositions for them | Robert H. Hofeldt | 1992-04-21 | $7,582,000 |
| 4405968 | Control circuits | — | 1983-09-20 |