Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8038031 | Portable manway cover hinge device | James J. Porebski | 2011-10-18 |
| 7931168 | Portable manway cover hinge device | James J. Porebski | 2011-04-26 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8038031 | Portable manway cover hinge device | James J. Porebski | 2011-10-18 |
| 7931168 | Portable manway cover hinge device | James J. Porebski | 2011-04-26 |