Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4995760 | Scraping device for making a subgrade | Martin Probst, Walter Schaffarzyk | 1991-02-26 |
| 4895477 | Scraping device for making a subgrade | Martin Probst, Walter Schaffarzyk | 1990-01-23 |