Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7475515 | Flush to grade utilities vault | Charles G. Machledt | 2009-01-13 |
| D548204 | Flush to grade utilities vault | Charles G. Machledt | 2007-08-07 |
| 6772566 | Below grade utilities vault | Charles G. Machledt | 2004-08-10 |