E21F 1/02

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Description

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)

Recent Patents

Patent #TitleFiling DateIssue DatePatent Owner
9995306 Method and system for fluid flow control in a fluid network systemDec 11, 13Jun 12, 18ABB Research Ltd.
9382798 Method and system for fluid flow control in a fluid network systemDec 04, 13Jul 05, 16ABB RESEARCH LTD.
9014859 System for controlling an ambient air parameterSep 27, 11Apr 21, 15ABB RESEARCH LTD.

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