Patents-Review.com
ClassID:

136253 ⎘

E21F1/08 - CPC Classification

Classification description:

Ventilation of mines or tunnels; Distribution of ventilating currents Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators

Sub-classes:
Recent Application in this class:
#1
20260117993
2026-04-30

TEMPERING ASSEMBLY FOR TEMPERING AIR OF A FACILITY AND CORRESPONDING METHOD

 #2
20260028911
2026-01-29

Ventilation System for Underground Environments

 #3
20250067180
2025-02-27

Coal and gas outburst monitoring device

 #4
20220268158
2022-08-25

Flood protection for underground air vents

 #5
20210207481
2021-07-08

Split air cabin ventilation system for construction of tunnel inclined shaft and ventilation method using same

 #6
20210156252
2021-05-27

SYSTEM AND METHOD FOR DUCTED VENTILATION

 #7
20210071405
2021-03-11

BLOWER AND VENTILATION SYSTEM

 #8
20200024944
2020-01-23

METHOD OF MINING SINGLE STEEPLY-INCLINED THICK COAL SEAM

 #9
20190201827
2019-07-04

Dry filter with enhanced separation output and convenient dimensions

 #10
20180112370
2018-04-26

Flood protection for underground air vents

 #11
20180087261
2018-03-29

BLOWER AND VENTILATING SYSTEM

 #12
20170343238
2017-11-30

Flood protection for underground air vents

 #13
20170343237
2017-11-30

Flood protection for underground air vents

 #14
20170314810
2017-11-02

Flood protection for underground air vents

 #15
20170314809
2017-11-02

Flood protection for underground air vents

 #16
20170314808
2017-11-02

Flood protection for underground air vents

 #17
20160333692
2016-11-17

VENTILATION DUCTING SYSTEMS & METHODS

 #18
20160305244
2016-10-20

SYSTEM AND METHOD FOR EXTRACTION OF SMOKE FROM ROAD TUNNELS

 #19
20160025105
2016-01-28

ENERGY-EFFICIENT TUNNEL VENTILATION DEVICE

 #20
20150226442
2015-08-13

Ventilator and blade therefor

 #21
20130340872
2013-12-26

SYSTEM AND APPARATUS FOR CONNECTING A GAS SOURCE TO A THERMAL OXIDISER

 #22
20130137356
2013-05-30

Method and system for tunnel ventilation in normal conditions and in conditions of fire

 #23
20090185864
2009-07-23

Automatic flooding protection for underground ventilation ducts

 #24
20090042504
2009-02-12

Tunnel cover for a tunnel for controlled ventilation of gas

 #25
20080254733
2008-10-16

Airflow Regulator