E21F 1/14

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Showing 1 to 20 of 49 results

Patent/Pub #TitleFiling DateIssue/Publication DatePatent Owner
9797250 Safe haven wallNov 11, 15Oct 24, 17Not available
9759065 Mine ventilation system and methodMay 07, 14Sep 12, 17GMS MINE REPAIR AND MAINTENANCE, INC.
9476301 Mine ventilation door with wings and slidable or pocket personnel doorFeb 22, 13Oct 25, 16AMERICAN MINE DOOR CO.
9447684 Mine stopping panel with end caps and louver connectionsAug 19, 13Sep 20, 16JACK KENNEDY METAL PRODUCTS & BUILDINGS, INC.
9447685 Mine ventilation structure and a deck panel for such a structureApr 14, 15Sep 20, 16JACK KENNEDY METAL PRODUCTS & BUILDINGS, INC.
9394788 Mine ventilation structure and a deck panel for such a structureApr 14, 15Jul 19, 16JACK KENNEDY METAL PRODUCTS & BUILDINGS, INC.
9022689 Pumpable mine ventilation structureFeb 07, 14May 05, 15ABC INDUSTRIES, INC., HEINTZMANN CORPORATION,
8966846 Steel anchored reinforced mine sealJun 11, 13Mar 03, 15STRATA MINE SERVICES
8807661 Method of controlling ventilation in a mine entry with polymeric gelJan 17, 12Aug 19, 14Micon
8801510 Inflatable ventilation life curtainMar 15, 07Aug 12, 14HEINTZMANN CORPORATION
8485873 Steel anchored reinforced mine sealJul 03, 07Jul 16, 13STRATA MINE SERVICES
8100479 Miner acoustic communication and location systemAug 14, 07Jan 24, 12BATTELLE MEMORIAL INSTITUTE
7286804 Receiver digital-analog converter and tuning circuitOct 14, 03Oct 23, 07NIIGATA SEIMITSU CO., LTD.
7267505 Mine ventilation panel systemSep 27, 04Sep 11, 07JACK KENNEDY METAL PRODUCTS & BUILDINGS, INC., KENNEDY METAL PRODUCTS & BUILDINGS, INC.,
7232368 Mine ventilationOct 07, 02Jun 19, 07JACK KENNEDY METAL PRODUCTS & BUILDINGS, INC.
7182687 Air deflecting mine ventilation structureJan 14, 05Feb 27, 07JACK KENNEDY METAL PRODUCTS & BUILDINGS, INC., KENNEDY METAL PRODUCTS & BUILDINGS, INC.,
7118472 Control system for pneumatically-powered door installationMay 27, 05Oct 10, 06JACK KENNEDY METAL PRODUCTS & BUILDINGS, INC., KENNEDY METAL PRODUCTS & BUILDINGS, INC.,
6846132 Mine stopping and braces thereforJan 29, 03Jan 25, 05JACK KENNEDY METAL PRODUCTS & BUILDINGS, INC.
6715961 Method of supporting mine walls and installing a mine stoppingFeb 01, 02Apr 06, 04JACK KENNEDY METAL PRODUCTS & BUILDINGS, INC.
6688813 Mine stopping and method of installing sameJul 11, 01Feb 10, 04JACK KENNEDY METAL PRODUCTS & BUILDINGS, INC.

Showing 1 to 20 of 49 results