Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10329812 | Tank cover access hatch with safety barrier | Jeffrey A. Hallsten, Ronald Kuehne | 2019-06-25 |
| 10227799 | Slide lock for hatch on gas containment cover | Jeffrey A. Hallsten | 2019-03-12 |
| 5845594 | Dock structure | John Hallsten, Jeffrey A. Hallsten | 1998-12-08 |