Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5194206 | Process for the manufacture of ceiling tile | John D. Koch, Richard N. Cunningham, C. F. Owen | 1993-03-16 |
| 5076985 | Method for forming ceiling tile | John D. Koch, Richard N. Cunningham | 1991-12-31 |