Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5675923 | Rigid sign with protective changeable indicia member | David U. Hillstrom | 1997-10-14 |
| 5592847 | Stepped segmented, closed-die forging | John Richard Palitsch, Joseph J. Zecco, Jr. | 1997-01-14 |