Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6202787 | Multipiece interfitting steps for a swimming pool | Emerich Kessler | 2001-03-20 |
| 5992563 | Multipiece interfitting steps for a swimming pool | Emerich Kessler | 1999-11-30 |