| 9153118 |
Proximity detection systems and method for internal traffic control |
Larry D. Frederick |
2015-10-06 |
| 8552882 |
Proximity detection systems and method for internal traffic control |
Larry D. Frederick |
2013-10-08 |
| 8169335 |
Electromagnetic field adjustment for proximity detection |
Larry D. Frederick |
2012-05-01 |
| 7686400 |
Geosteering detectors for rotary-type continuous miners |
Larry D Fredrick, Roy W. Tivas |
2010-03-30 |
| 7485851 |
Compound optical coupler and support mechanism |
Larry D. Frederick, Dean Estill |
2009-02-03 |
| 7485865 |
Compound optical coupler and support mechanism |
Larry D. Frederick, Dean Estill |
2009-02-03 |
| 7420471 |
Safety system for mining equipment |
Larry D. Frederick, Patricia Nichols, Connie Allen |
2008-09-02 |
| 7402804 |
Geosteering of solid mineral mining machines |
Larry D. Frederick |
2008-07-22 |
| 7381957 |
Compound optical coupler and support mechanism |
Larry D. Frederick, Dean Estill |
2008-06-03 |
| 7360844 |
Geosteering detectors for boring-type continuous miners |
Larry D. Frederick, Roy W. Tivas |
2008-04-22 |
| 7247853 |
Instrumentation package and integrated radiation detector |
Larry D. Frederick, Frederick Louis Glesius |
2007-07-24 |
| 7115873 |
Compound optical coupler and support mechanism |
Dean Estill |
2006-10-03 |
| 7034305 |
Instrumentation package and integrated radiation detector |
Larry D. Frederick, Frederick Louis Glesius |
2006-04-25 |
| 6781130 |
Geosteering of solid mineral mining machines |
Larry D. Frederick |
2004-08-24 |
| 6657199 |
Flexible dynamic housing |
Larry D. Frederick |
2003-12-02 |
| 6465788 |
Ruggedized photomultiplier tube and optical coupling in armored detector |
— |
2002-10-15 |
| 6452163 |
Armored detector having explosion proof enclosure |
Larry D. Frederick |
2002-09-17 |
| 6435619 |
Method for sensing coal-rock interface |
Larry D. Frederick |
2002-08-20 |
