Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9322144 | Manhole cover assembly with cams | — | 2016-04-26 |
| 6196760 | Adjustment riser | — | 2001-03-06 |
| 6161984 | Manhole or catch basin assembly | — | 2000-12-19 |
| D393320 | Parking curb | — | 1998-04-07 |
| D387181 | Speed bump | — | 1997-12-02 |
| 5357801 | Liquid-level gauging | — | 1994-10-25 |
| 5309763 | Liquid-level gauging | — | 1994-05-10 |
| 5301549 | Liquid-level gauging | — | 1994-04-12 |