Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875936 | Conversion of letterpress to offset printing | — | 1989-10-24 |
| 4798137 | Conversion of letterpress to offset printing | Duane H. Houy | 1989-01-17 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875936 | Conversion of letterpress to offset printing | — | 1989-10-24 |
| 4798137 | Conversion of letterpress to offset printing | Duane H. Houy | 1989-01-17 |