E21F1/10 - CPC Classification Index

ClassID:

136255 ⎘

E21F1/10 - CPC Classification

Classification description:

Ventilation of mines or tunnels; Distribution of ventilating currents Air doors

Sub-classes:

E21F1/12 » Devices for automatically opening air doors 3

Recent Application in this class:

20250003337

2025-01-02

Ventilation method for high gas working face based on alternating intake and air return in mine gallery

20200208520

2020-07-02

Sealing system

20170130506

2017-05-11

Articulated mine door opening mechanism

20170107817

2017-04-20

Mine door

20170037676

2017-02-09

Mine ventilation door with wings and slidable or pocket personnel door

20160281503

2016-09-29

Mine stopping panel with end caps and louver connections

20160061032

2016-03-03

Ventilated mine roof support

20140311042

2014-10-23

Method of opening a mine door leaf

20140273791

2014-09-18

MINE AIRLOCK SYSTEM AND METHOD

#10

20140075849

2014-03-20

Inflatable air barriers

#11

20140024304

2014-01-23

Mine ventilation door with wings and slidable or pocket personnel door

#12

20140022077

2014-01-23

Control system for mine ventilation door

#13

20140020296

2014-01-23

Robust mine ventilation door with single actuation system

#14

20110203182

2011-08-25

Articulated mine door opening mechanism

#15

20080253841

2008-10-16

Hydraulically powered door and systems for operating same in low-temperature environments

#16

20080092475

2008-04-24

Fire resistant mine door sealing system

#17

18148608

2024-03-05

Latch assembly for a mine door and a mine door having such an assembly