Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11479920 | Method for maintaining wood railroad ties | Michael Raab | 2022-10-25 |
| 11255053 | Composition, device, and method for maintaining wood railroad ties | Jacob David Rutzebeck, Michael Raab | 2022-02-22 |
| 6255370 | Rail spike retention and tie preservation mixture and method | Michael Raab | 2001-07-03 |
| 5993531 | Low temperature concrete hardener | Nicholas P. Ehnot | 1999-11-30 |