Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5022963 | Wet end corrugating of acoustical tile | William F. Porter, Michael J. Porter | 1991-06-11 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5022963 | Wet end corrugating of acoustical tile | William F. Porter, Michael J. Porter | 1991-06-11 |