Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D499175 | Portable toilet | William Jay Kelley, Daniel Sommerfeld, David Joseph Harris | 2004-11-30 |
| 6766541 | Joint for a portable restroom | Daniel Sommerfeld, David Joseph Harris, William Jay Kelley | 2004-07-27 |