Class E21F : SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINAGE IN OR OF MINES OR TUNNELS
Subclass 1/02: Ventilation of mines or tunnels; Distribution of ventilating currents (ventilating rooms or spaces in general F24F) Test models (analogue computers therefor G06G 7/5)
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 10809417 | Three-dimensional analog simulation test system for gas-liquid countercurrent in abandoned mine goaf | Dec 27, 18 | Oct 20, 20 | Taiyuan University of Technology |
| 9995306 | Method and system for fluid flow control in a fluid network system | Dec 11, 13 | Jun 12, 18 | ABB Research Ltd. |
| 9382798 | Method and system for fluid flow control in a fluid network system | Dec 04, 13 | Jul 05, 16 | ABB RESEARCH LTD. |
| 9014859 | System for controlling an ambient air parameter | Sep 27, 11 | Apr 21, 15 | ABB RESEARCH LTD. |
| Upgrade to the Professional Level to view Top Owners for this Subclass.Learn More |
|---|
