Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6112629 | Weld-free gratings and method and punch and die for forming same | — | 2000-09-05 |
| 5864910 | Concrete composite weldless grating | — | 1999-02-02 |
| 5806121 | Lightweight weldless gratings or grids for bridge decks | — | 1998-09-15 |
| 5784741 | Weld-free gratings for bridge decks with improved slotted opening | — | 1998-07-28 |
| 5735008 | Weld-free gratings for bridge decks with improved primary and secondary bars | — | 1998-04-07 |
| 5642549 | Weldless gratings or grids for bridge decks | — | 1997-07-01 |
| 5604949 | Weld-free gratings for bridge decks | — | 1997-02-25 |
| 5463786 | Weldless grating for bridge decks | Dennis M Imm | 1995-11-07 |