| 7284933 |
Square embossed roof and rib plate |
Frank Calandra, Jr., Jack R. Eaton, John C. Stankus, Demrey G. Brandon |
2007-10-23 |
| 6322290 |
Cable bolt head |
Frank Calandra, Jr., Stanley Ponce, John G. Oldsen, John C. Stankus, Brian R. Castle |
2001-11-27 |
| 6056482 |
Cable bolt head |
Frank Calandra, Jr., Stanley Ponce, John G. Oldsen, John C. Stankus, Brian R. Castle |
2000-05-02 |
| 5829922 |
Cable bolt head |
Frank Calandra, Jr., Stanley Ponce, John G. Oldsen, John C. Stankus, Brian R. Castle +1 more |
1998-11-03 |
| RE35902 |
Bearing plate |
Frank Calandra, Jr., John C. Stankus |
1998-09-22 |
| 5769570 |
Cable tensioning dome plate |
John C. Stankus, Kendal L. Taylor |
1998-06-23 |
| 5450663 |
Method for fabricating a truss member for a mine roof support |
Frank Calandra, Jr., Jerry E. Frease, Lajos Kovacs, John C. Stankus |
1995-09-19 |
| 5385433 |
Bearing plate |
Frank Calandra, Jr., John C. Stankus, Dominic Cricelli |
1995-01-31 |
| 5302056 |
Method and apparatus for supporting a mine roof |
Frank Calandra, Jr., Jerry E. Frease, Lajos Kovacs, John C. Stankus |
1994-04-12 |
| 5292209 |
Bearing plate |
Frank Calandra, Jr., John C. Stankus |
1994-03-08 |
| 5181800 |
Mine roof anchor having adjustable resin retaining washer |
John C. Stankus, Glen S. Grissinger |
1993-01-26 |
| 5082399 |
Mine roof anchor having adjustable resin retaining washer and expansion shell assembly with friction reducing means |
Jerry E. Frease, John C. Stankus, Glen S. Grissinger |
1992-01-21 |
| 4865489 |
Mine roof anchor having adjustable resin retaining washer |
John C. Stankus, Glen S. Grissinger |
1989-09-12 |