Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6786234 | Drainage tile flow regulator | Charlie J. Schafer, William Littler IV | 2004-09-07 |
| 6715508 | Drainage tile flow regulator | Charlie J. Schafer, William Littler, IV | 2004-04-06 |