Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6619888 | Flange nut for mine roof bolt | Frank Calandra, Jr., John C. Stankus, Michael Cokus, Steve Oyler | 2003-09-16 |
| 6612783 | Cable bolt with mixing delay device | John C. Stankus | 2003-09-02 |