Class E21C : MINING OR QUARRYING
Subclass 25/34: Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam (dislodging machines with slitting means E21C 27/02, E21C 27/1, E21C 27/18) Machines slitting solely by one or more cutter chains moving unidirectionally along jibs Chains or chain guides Chains
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 11530095 | Chain conveyor and link for same | Jul 20, 20 | Dec 20, 22 | Joy Global Underground Mining LLC |
| 11440736 | Chain conveyor | Apr 19, 21 | Sep 13, 22 | Joy Global Underground Mining LLC |
| 11332316 | Chain conveyor and link for same | Jul 20, 20 | May 17, 22 | Joy Global Underground Mining LLC |
| 10981728 | Chain conveyor | Sep 16, 19 | Apr 20, 21 | Joy Global Underground Mining LLC |
| 10974905 | Chain conveyor and coupler link for same | Oct 14, 19 | Apr 13, 21 | Joy Global Underground Mining LLC |
| 10900354 | Drilling and cutting device | Dec 30, 16 | Jan 26, 21 | Not available |
| 10717603 | Chain conveyor and link for same | Mar 06, 18 | Jul 21, 20 | Joy Global Underground Mining LLC |
| 10604347 | Drive shaft and sprockets for chain conveyor | Mar 06, 18 | Mar 31, 20 | Joy Global Underground Mining LLC |
| 10442627 | Chain conveyor and coupler link for same | Mar 06, 18 | Oct 15, 19 | Joy Global Underground Mining LLC |
| 10414594 | Chain conveyor | Mar 06, 18 | Sep 17, 19 | Joy Global Underground Mining LLC |
| 10392193 | Chain conveyor link | Mar 06, 18 | Aug 27, 19 | Joy Global Underground Mining LLC |
| 7360844 | Geosteering detectors for boring-type continuous miners | Jul 29, 04 | Apr 22, 08 | THE MOSAIC COMPANY |
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2018/0058,215 | DRILLING AND CUTTING DEVICE | Dec 30, 16 | Mar 01, 18 | Not available |
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