Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11920618 | Hidden fastener unit and related method of use | Roger A. Vandenberg | 2024-03-05 |
| 11261893 | Hidden fastener unit and related method of use | Roger A. Vandenberg | 2022-03-01 |
| 5444953 | Interior corner joint simulating grout line for wall boards simulating tiles embedded in grout | Paul J. Koenig, David W. Gibbard, Richard C. Manwell | 1995-08-29 |
| 5263294 | Extension joint simulating grout like for tile board | Paul J. Koenig, David W. Gibbard, Richard C. Manwell | 1993-11-23 |