Class E21F : SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINAGE IN OR OF MINES OR TUNNELS
Subclass 1/04: Ventilation of mines or tunnels; Distribution of ventilating currents (ventilating rooms or spaces in general F24F) Air ducts (suspension devices E21F 17/02)
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 11933177 | Ventilation system | Jun 01, 21 | Mar 19, 24 | 501 Toyota Jidosha Kabushiki Kaisha |
| 11807279 | Track structure with hollow center rail usable as ventilation duct | May 15, 23 | Nov 07, 23 | RIINO Inc. |
| 11739640 | Hose for providing an emergency fresh air supply to an underground vault after an explosion | Dec 03, 18 | Aug 29, 23 | NOVINIUM, LLC |
| 11377952 | Method for radially mining open-pit end slope pressed coal | Oct 08, 19 | Jul 05, 22 | China University of Mining and Technology |
| 10760420 | Underground ventilation apparatus and method | Jan 22, 16 | Sep 01, 20 | Polyvent PTY LTD |
| 10619884 | Security for grate covering underground air vents | Oct 28, 17 | Apr 14, 20 | Floodbreak, L.L.C. |
| 9618145 | Duct with electrically conductive coating | Apr 01, 14 | Apr 11, 17 | HAMILTON SUNDSTRAND CORPORATION |
| 9447685 | Mine ventilation structure and a deck panel for such a structure | Apr 14, 15 | Sep 20, 16 | JACK KENNEDY METAL PRODUCTS & BUILDINGS, INC. |
| 9200815 | Ventilation ducting arrangement | Aug 24, 12 | Dec 01, 15 | ABC INDUSTRIES, INC. |
| 5217406 | Mine ventilation tubing system and method of installation | Mar 17, 92 | Jun 08, 93 | PEABODY ENERGY CORPORATION |
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2024/0101,162 | TRACK STRUCTURE WITH CENTER RAIL | Sep 27, 23 | Mar 28, 24 | RIINO Inc. |
| 2024/0003,254 | VERTICAL ORTHOGONAL TOP EXHAUSTING AIR DUCT STRUCTURE OF DEEPLY-BURIED SUBWAY STATION AND CONSTRUCTION METHOD THEREFOR | Jul 03, 23 | Jan 04, 24 | BEIJING URBAN CONSTRUCTION DESIGN & DEVELOPMENT GROUP CO. LIMITED; |
| 2020/0217,202 | GROUND WELLHOLE DEDICATED PROTECTIVE PIPE FOR GAS EXTRACTION OF MINING-INDUCED AREA | Jul 13, 18 | Jul 09, 20 | Not available |
| 2018/0003,058 | VENTILATION DUCT | Jun 29, 17 | Jan 04, 18 | HIRAM (WA) PTY LTD |
| 2016/0333,692 | VENTILATION DUCTING SYSTEMS & METHODS | Jan 12, 15 | Nov 17, 16 | Not available |
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