Class E21F : SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINAGE IN OR OF MINES OR TUNNELS
Subclass 1/10: Ventilation of mines or tunnels; Distribution of ventilating currents (ventilating rooms or spaces in general F24F) Air doors (doors in general E06B)
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 12221888 | Ventilation method for high gas working face based on alternating intake and air return in mine gallery | Sep 13, 24 | Feb 11, 25 | Taiyuan University of Technology |
| 11920390 | Latch assembly for a mine door and a mine door having such an assembly | Dec 30, 22 | Mar 05, 24 | Jack Kennedy Metal Products & Buildings, Inc. |
| 11293285 | Sealing system | Oct 18, 17 | Apr 05, 22 | The Secretary of State for Defence |
| 10538956 | Mine ventilation door with wings and slidable or pocket personnel door | Oct 24, 16 | Jan 21, 20 | AMERICAN MINE DOOR CO. |
| 10316663 | Mine door | Oct 12, 16 | Jun 11, 19 | Jack Kennedy Metal Products & Buildings, Inc. |
| 10184286 | Articulated mine door opening mechanism | Nov 04, 16 | Jan 22, 19 | Jack Kennedy Metal Products & Buildings, Inc. |
| 10151203 | Mine stopping panel with end caps and louver connections | Jun 08, 16 | Dec 11, 18 | Jack Kennedy Metal Products & Buildings, Inc. |
| 9611738 | Ventilated mine roof support | Aug 27, 14 | Apr 04, 17 | BURRELL MINING PRODUCTS, INC. |
| 9562432 | Inflatable air barriers | Sep 20, 12 | Feb 07, 17 | RITE-HITE HOLDING CORPORATION |
| 9476301 | Mine ventilation door with wings and slidable or pocket personnel door | Feb 22, 13 | Oct 25, 16 | AMERICAN MINE DOOR CO. |
| 9341061 | Method of opening a mine door leaf | Jul 01, 14 | May 17, 16 | JACK KENNEDY METAL PRODUCTS & BUILDINGS, INC., KENNEDY METAL PRODUCTS & BUILDINGS, INC., |
| 9181802 | Robust mine ventilation door with single actuation system | Feb 22, 13 | Nov 10, 15 | AMERICAN MINE DOOR CO. |
| 8884760 | Control system for mine ventilation door | Feb 22, 13 | Nov 11, 14 | AMERICAN MINE DOOR CO. |
| 6361430 | Balanced ventilation doors | Feb 20, 01 | Mar 26, 02 | ZACON LIMITED |
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