Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8002977 | Storm drain anchored grate cover | Mark D. Shaw, J. Tad Heyman | 2011-08-23 |
| 7879233 | Drain grate filter assembly with compressible anchors | Mark D. Shaw, J. Tad Heyman | 2011-02-01 |