Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4783001 | Universal non-spreading railroad track haulage tie assembly | — | 1988-11-08 |
| 4498816 | Mine roof support system | Thomas J. Korpela | 1985-02-12 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4783001 | Universal non-spreading railroad track haulage tie assembly | — | 1988-11-08 |
| 4498816 | Mine roof support system | Thomas J. Korpela | 1985-02-12 |