Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7611304 | Catch basin curb inlet cover | Clifford F. Lill | 2009-11-03 |
| 7475585 | Punch tool for security purposes | Clifford F. Lill | 2009-01-13 |
| 7128495 | Curb box cover assembly | Clifford F. Lill | 2006-10-31 |