Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4812343 | Pultruded fiber reinforced plastic marking devices | John H. Kiekhaefer, Jack E. Perko, Frank W. Harris | 1989-03-14 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4812343 | Pultruded fiber reinforced plastic marking devices | John H. Kiekhaefer, Jack E. Perko, Frank W. Harris | 1989-03-14 |