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| More topics under "E21F - Safety devices, transport, filling-up, rescue, ventilation, or drainage in or of mines or tunnels" (20,613) |
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| E21F 1 - Ventilation of mines or tunnels; Distribution of ventilating currents (2,288) | | E21F 11 - Rescue devices or other safety devices, e.g. safety chambers, escape ways (2,410) | | E21F 13 - Transport specially adapted to underground conditions (2,802) | | E21F 15 - Methods or devices for placing filling-up materials in underground workings (1,589) | | E21F 16 - Drainage (1,138) | | E21F 17 - Methods or devices for use in mines or tunnels, not covered elsewhere (4,758) | | E21F 3 - Cooling or drying of air (640) | | E21F 5 - Means or methods for preventing, binding, depositing or removing dust; Preventing explosions or fires (2,735) | | E21F 7 - Methods or devices for drawing-off gases with or without subsequent use of the gas for any purpose (2,187) | | E21F 9 - Devices preventing sparking of machines or apparatus (66) |
| Patents for E21F - Safety devices, transport, filling-up, rescue, ventilation, or drainage in or of mines or tunnels (10) |
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| 09/28/2010 | US7802622 Cable-protective pipe section, a method of protectively arranging at least one cable on the outside of the pipe section and use of a device for protecting the cable | | 05/21/2009 | US20090126943 Cable-Protective Pipe Section, a Method of Protectively Arranging at Least One Cable on the Outside of the Pipe Section and Use of a Device for Protecting the Cable | | 02/12/2009 | US20090042504 Tunnel cover for a tunnel for controlled ventilation of gas | | 07/25/2007 | EP1809861A1 A tunnel cover for a tunnel for controlled ventilation of gas | | 07/13/2006 | WO2006073309A1 A cable-protective pipe section, a method of protectively arranging at least one cable on the outside of the pipe section and use of a device for protecting the cable | | 04/27/2006 | WO2006043889A1 A tunnel cover for a tunnel for controlled ventilation of gas | | 04/27/2006 | CA2584729A1 A tunnel cover for a tunnel for controlled ventilation of gas | | 08/11/2005 | WO2005072827A1 Rescue equipment | | 12/25/2001 | US6332401 Method and apparatus for pressure wave suppression in small-charge blasting | | 11/27/2001 | US6321655 Method and apparatus for flyrock control in small charge blasting |
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