Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5444953 | Interior corner joint simulating grout line for wall boards simulating tiles embedded in grout | Paul J. Koenig, Douglas F. Hutchings, David W. Gibbard | 1995-08-29 |
| 5263294 | Extension joint simulating grout like for tile board | Paul J. Koenig, Douglas F. Hutchings, David W. Gibbard | 1993-11-23 |