Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884509 | Mobile tie gang apparatus | Josef Theurer, Johann Hansmann | 1989-12-05 |
| 4829907 | Mobile installation for loading, transporting and unloading as well as exchanging railroad ties | Josef Theurer, Johann Hansmann | 1989-05-16 |
| 4794861 | Tie exchange method | Josef Theurer, Johann Hansmann | 1989-01-03 |