Class E21F : SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINAGE IN OR OF MINES OR TUNNELS
Subclass 1/08: Ventilation of mines or tunnels; Distribution of ventilating currents (ventilating rooms or spaces in general F24F) Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators (ventilators per seF04D)
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 12258865 | Coal and gas outburst monitoring device | Aug 16, 24 | Mar 25, 25 | HENAN POLYTECHNIC UNIVERSITY |
| 11946376 | Flood protection for underground air vents | Feb 18, 22 | Apr 02, 24 | Floodbreak, L.L.C. |
| 11674392 | Split air cabin ventilation system for construction of tunnel inclined shaft and ventilation method using same | Mar 25, 21 | Jun 13, 23 | CHINA RAILWAY BEIJING ENGINEERING GROUP CO., LTD; The No. 1 Engineering Co., Ltd of China Railway Beijing Engineering Group; CHANG'AN UNIVERSITY; |
| 11103820 | Dry filter with enhanced separation output and convenient dimensions | Jan 03, 19 | Aug 31, 21 | CFT GmbH Compact Filter Technic |
| 10435906 | Flood protection for underground air vents | Jul 14, 17 | Oct 08, 19 | Floodbreak, L.L.C. |
| 10435909 | Flood protection for underground air vents | Jul 14, 17 | Oct 08, 19 | Floodbreak, L.L.C. |
| 10435908 | Flood protection for underground air vents | Jul 14, 17 | Oct 08, 19 | Floodbreak, L.L.C. |
| 10435907 | Flood protection for underground air vents | Jul 14, 17 | Oct 08, 19 | Floodbreak, L.L.C. |
| 10435910 | Flood protection for underground air vents | Jul 14, 17 | Oct 08, 19 | Floodbreak, L.L.C. |
| 10106945 | Flood protection for underground air vents | Oct 20, 17 | Oct 23, 18 | Floodbreak, L.L.C. |
| 9752436 | Method and system for tunnel ventilation in normal conditions and in conditions of fire | Jan 25, 13 | Sep 05, 17 | PAVETIC, JOSIP, PAVETIC, SVIBOR, |
| 9664399 | Ventilator and blade therefor | Sep 09, 13 | May 30, 17 | CSR BUILDING PRODUCTS LIMITED |
| 9644854 | Rotor ventilator | Sep 09, 13 | May 09, 17 | CSR BUILDING PRODUCTS LIMITED |
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2022/0268,158 | FLOOD PROTECTION FOR UNDERGROUND AIR VENTS | Feb 18, 22 | Aug 25, 22 | Not available |
| 2021/0156,252 | SYSTEM AND METHOD FOR DUCTED VENTILATION | Feb 22, 18 | May 27, 21 | Not available |
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