Issued Patents All Time
Showing 26–49 of 49 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7360971 | Yieldable prop | John C. Stankus, Demrey G. Brandon | 2008-04-22 |
| 7334968 | Yieldable prop | John C. Stankus, Demrey G. Brandon | 2008-02-26 |
| 7296950 | Point anchor coated mine roof bolt | John C. Stankus | 2007-11-20 |
| 7261494 | Truss shoe | John C. Stankus, Demrey G. Brandon, Arthur J. Craven, Jeffrey J. Stankus | 2007-08-28 |
| 7134810 | Yieldable prop having a yield section | John C. Stankus | 2006-11-14 |
| 7114888 | Yieldable prop | John C. Stankus | 2006-10-03 |
| 7073982 | Point anchor coated mine roof bolt | John C. Stankus | 2006-07-11 |
| 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 |
| 6322290 | Cable bolt head | Frank Calandra, Jr., Eugene H. Stewart, Stanley Ponce, John C. Stankus, Brian R. Castle | 2001-11-27 |
| 6056482 | Cable bolt head | Frank Calandra, Jr., Eugene H. Stewart, Stanley Ponce, John C. Stankus, Brian R. Castle | 2000-05-02 |
| 5967703 | Mine roof support system | John C. Stankus, Brian R. Castle | 1999-10-19 |
| 5957627 | Pillar cable truss system | John C. Stankus, Brian R. Castle | 1999-09-28 |
| 5954455 | Combination bolt system | Jack R. Eaton, Frank Calandra, Jr., John C. Stankus | 1999-09-21 |
| 5919006 | Tensionable cable bolt with mixing assembly | Frank Calandra, Jr., John C. Stankus, James J. Scott, Brian R. Castle, Kendal L. Taylor +1 more | 1999-07-06 |
| 5836720 | Mine roof support system | John C. Stankus, Brian R. Castle | 1998-11-17 |
| 5829922 | Cable bolt head | Frank Calandra, Jr., Eugene H. Stewart, Stanley Ponce, John C. Stankus, Brian R. Castle +1 more | 1998-11-03 |
| 5785463 | Combination cable bolt system | Jack R. Eaton, Frank Calandra, Jr. | 1998-07-28 |
| 5741092 | Cable bolt driver | Brian R. Castle, John C. Stankus | 1998-04-21 |
| 5699572 | Combination cable spreader and cable driver | Brian R. Castle, James J. Scott | 1997-12-23 |
| 5556234 | Mine roof bolt assembly | John C. Stankus | 1996-09-17 |
| 5511909 | Cable bolt and method of use in supporting a rock formation | Frank Calandra, Jr., John C. Stankus | 1996-04-30 |
| 5437830 | Process of making a rod for use in reinforcing an underground rock formation | Frank Calandra, Jr., John C. Stankus | 1995-08-01 |
| 5314268 | Non-metallic reinforcing rod and method of use in supporting a rock formation | Frank Calandra, Jr., John C. Stankus | 1994-05-24 |