E21F 1/04

Sub-Class

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Description

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)

Recent Patents

Patent #TitleFiling DateIssue DatePatent Owner
9618145 Duct with electrically conductive coatingApr 01, 14Apr 11, 17HAMILTON SUNDSTRAND CORPORATION
9447685 Mine ventilation structure and a deck panel for such a structureApr 14, 15Sep 20, 16JACK KENNEDY METAL PRODUCTS & BUILDINGS, INC.
9200815 Ventilation ducting arrangementAug 24, 12Dec 01, 15ABC INDUSTRIES, INC.
5217406 Mine ventilation tubing system and method of installationMar 17, 92Jun 08, 93PEABODY ENERGY CORPORATION

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Recent Publications

Publication #TitleFiling DatePub DatePatent Owner
2018/0003,058 VENTILATION DUCTJun 29, 17Jan 04, 18HIRAM (WA) PTY LTD
2016/0333,692 VENTILATION DUCTING SYSTEMS & METHODSJan 12, 15Nov 17, 16Not available

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Patents Issued To Date - By Filing Year

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