Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4679731 | Railway track structure and a method of building such structure and bags filled with ballast material | Karl Klugar | 1987-07-14 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4679731 | Railway track structure and a method of building such structure and bags filled with ballast material | Karl Klugar | 1987-07-14 |