Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D343115 | Collapsible water tube for securing a cover over a swimming pool | Lance Grandahl | 1994-01-11 |
| 5199590 | Collapsible device for securing a cover over a swimming pool | Lance Grandahl | 1993-04-06 |