Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D444332 | Slidable shelf | Joseph Paul Kirchberg | 2001-07-03 |
| 5769469 | Window latch | — | 1998-06-23 |
| 5582445 | Sash lock | Carl James Olsen | 1996-12-10 |
| D350275 | Sash lock | Carl James Olsen | 1994-09-06 |
| 5056159 | Combination tray and bib | — | 1991-10-15 |