Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866866 | Collapsible sign | Bernard J. Rotter, Timothy M. Whitten | 1989-09-19 |
| 4866894 | Stairway construction device | — | 1989-09-19 |
| 4827316 | Printing frame | — | 1989-05-02 |
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866866 | Collapsible sign | Bernard J. Rotter, Timothy M. Whitten | 1989-09-19 |
| 4866894 | Stairway construction device | — | 1989-09-19 |
| 4827316 | Printing frame | — | 1989-05-02 |