ClassID:

138124

F01N2470/20 - CPC Classification

Classification description:

Structure or shape of gas passages, pipes or tubes Dimensional characteristics of tubes, e.g. length, diameter

Recent Application in this class:
#1
20260092544
2026-04-02

Tunable Exhaust System

#2
20250347243
2025-11-13

EXHAUST PURIFICATION APPARATUS

#3
20250237160
2025-07-24

MIXER FOR EXHAUST AFTERTREATMENT SYSTEM

#4
20250172081
2025-05-29

MARINE VESSEL AND EXHAUST MANIFOLD FOR MARINE VESSEL

#5
20240060437
2024-02-22

Exhaust gas cooling device

#6
20240011424
2024-01-11

Mixing device

#7
20230383677
2023-11-30

Timbre scaled exhaust system

#8
20230113789
2023-04-13

Mixer

#9
20220220874
2022-07-14

Exhaust system and muffler

#10
20220178297
2022-06-09

Exhaust passage structure of internal combustion engine

#11
20220090533
2022-03-24

Saddle-riding type vehicle exhaust structure

#12
20220065146
2022-03-03

Exhaust gas purification filter

#13
20220025794
2022-01-27

ENGINE TAIL GAS DUST REMOVING SYSTEM AND METHOD

#14
20210285349
2021-09-16

Surface component for vehicle exhaust system

#15
20210222594
2021-07-22

Tunable Exhaust System

#16
20210131343
2021-05-06

Two-passage exhaust system for an engine

#17
20210131329
2021-05-06

Systems and methods for controlling flow distribution in an aftertreatment system

#18
20210108544
2021-04-15

EXHAUST SYSTEM FOR INTERNAL COMBUSTION ENGINE

#19
20210040903
2021-02-11

Engine and vehicle having throttle control

#20
20200408119
2020-12-31

Timbre scaled exhaust system

#21
20200248598
2020-08-06

Tail pipe

#22
20190368396
2019-12-05

Muffler for an exhaust system of an internal combustion engine

#23
20190249573
2019-08-15

Turbo housing element

#24
20190218952
2019-07-18

Catalytic converter for classic cars

#25
20190186323
2019-06-20

Exhaust system for a work vehicle

#26
20190153923
2019-05-23

TWO-SECTIONED BACK-PRESSURED CATALYTIC CONVERTER

#27
20190085744
2019-03-21

Exhaust device for internal combustion engine

#28
20190078476
2019-03-14

Exhaust device for internal combustion engine

#29
20190055866
2019-02-21

Exhaust device for internal combustion engine

#30
20190032530
2019-01-31

Combined exhaust gas silencer

#31
20180374473
2018-12-27

Exhaust system sound generation assembly unit

#32
20180202345
2018-07-19

Method for molding pipe body

#33
20180163601
2018-06-14

Mixing apparatus for an exhaust gas aftertreatment system, exhaust gas aftertreatment system and internal combustion engine

#34
20180156103
2018-06-07

Mounting interface for exhaust gas treatment assembly

#35
20180135510
2018-05-17

Exhaust gas pressure regulator for a combustion engine

#36
20180106171
2018-04-19

Exhaust pipe structure

#37
20180073417
2018-03-15

EXHAUST SYSTEM FOR VEHICLE

#38
20180030874
2018-02-01

Mix box

#39
20180023429
2018-01-25

Timbre scaled exhaust system

#40
20170370270
2017-12-28

Water ingress preventing structure for tailpipe

#41
20170362976
2017-12-21

Exhaust system for an engine

#42
20170234202
2017-08-17

Exhaust device for internal combustion engine

#43
20170218830
2017-08-03

Muffler for an exhaust system

#44
20170218829
2017-08-03

Exhaust manifold for a multicylinder internal combustion engine

#45
20170211439
2017-07-27

Exhaust gas system for an internal combustion engine

#46
20170138246
2017-05-18

Exhaust system for engine

#47
20170114698
2017-04-27

Exhaust-gas module for an internal combustion engine

#48
20170002713
2017-01-05

Exhaust tract having a metering device which sprays counter to a direction of flow, method for operating an exhaust tract and vehicle having an exhaust tract

#49
20160346776
2016-12-01

Honeycomb structure

#50
20160341084
2016-11-24

Engine system with turbulence assisted damping of low frequency sound

#51
20160290209
2016-10-06

Catalytic converter

#52
20160245147
2016-08-25

Exhaust device of motorcycle

#53
20160230627
2016-08-11

Muffler

#54
20160176476
2016-06-23

Motorcycle and motorcycle rear wheel swingarm with integrated resonator

#55
20160146086
2016-05-26

Exhaust system structure for improving noise problem

#56
20160061089
2016-03-03

Exhaust device of multi-cylinder engine

#57
20150377104
2015-12-31

Exhaust gas line section for supplying liquid additive

#58
20150369103
2015-12-24

Engine unit and work vehicle

#59
20150337878
2015-11-26

Channeling fluidic waveguide surfaces and tubes

#60
20150275721
2015-10-01

System and method for tuned exhaust

#61
20150240688
2015-08-27

Funnel-pipe arrangement

#62
20150204280
2015-07-23

Gas flow unit, a gas treatment device and a combustion engine provided therewith

#63
20150068835
2015-03-12

Muffler shell for use in the exhaust system of a vehicle

#64
20150059913
2015-03-05

Exhaust pipe

#65
20150047922
2015-02-19

Muffler having coupling of a tailpipe by means of a coupling chamber

#66
20150041996
2015-02-12

Mixing structure

#67
20150000256
2015-01-01

Engine unit and work vehicle

#68
20140348715
2014-11-27

Exhaust treatment device

#69
20140314632
2014-10-23

Exhaust aftertreatment device with integrated shell and baffle

#70
20140291067
2014-10-02

Exhaust silencing device

#71
20140290232
2014-10-02

Exhaust pipe structure for internal combustion engine

#72
20140250874
2014-09-11

Exhaust device for multicylinder engine

#73
20140196980
2014-07-17

Silencing apparatus for a vehicle

#74
20140158249
2014-06-12

Channeling gas flow tube

#75
20140000574
2014-01-02

Muffler and engine-driven work machine

#76
20130247545
2013-09-26

Exhaust aftertreatment system for internal combustion engine

#77
20130230434
2013-09-05

Four cycle internal combustion engine exhaust

#78
20130213734
2013-08-22

Horizontally installed muffler having sporty tone

#79
20130125535
2013-05-23

Exhaust system for two-stroke internal combustion engine

#80
20130081721
2013-04-04

EXHAUST-DOWNPIPE FOR VEHICLE

#81
20130067891
2013-03-21

Exhaust aftertreatment system

#82
20120273297
2012-11-01

Channeling gas flow tube

#83
20120228053
2012-09-13

Silencer for a two-stroke motor of a power tool

#84
20120222767
2012-09-06

Exhaust aftertreatment device with integrated shell and baffle

#85
20120180465
2012-07-19

Exhaust apparatus of internal combustion engine

#86
20120168245
2012-07-05

Exhaust pipe part and exhaust apparatus for internal combustion engine

#87
20120160588
2012-06-28

Exhaust device of a vehicle and a utility vehicle provided with the same

#88
20120137666
2012-06-07

Exhaust gas apparatus of an internal combustion engine

#89
20120085589
2012-04-12

Muffler for vehicle

#90
20110296820
2011-12-08

ENGINE EXHAUST GAS TREATMENT DEVICE INCLUDING ELECTRICALLY ACTUATED HYDROCARBON ADSORBER BYPASS VALVE

#91
20110192669
2011-08-11

Vehicle and vehicle exhaust pipe

#92
20110162358
2011-07-07

Exhaust gas purification system for diesel engines of utility motor vehicles

#93
20110154812
2011-06-30

Oval-to-round exhaust collector system

#94
20100300799
2010-12-02

Exhaust silencer device for internal combustion engine

#95
20100300072
2010-12-02

Coupling of a turbocharger with an oxidation catalyst of an exhaust line of an internal combustion engine

#96
20100213000
2010-08-26

Vehicular muffler and motorcycle incorporating same

#97
20100192557
2010-08-05

Multi-cylinder internal combustion engine, vehicle, marine vessel, and exhausting method for multi-cylinder internal combustion engine

#98
20100192556
2010-08-05

Internal combustion engine, vehicle, marine vessel, and secondary air supply method for internal combustion engine

#99
20100192553
2010-08-05

Internal combustion engine, vehicle, marine vessel, and exhaust gas cleaning method for internal combustion engine

#100
20100143210
2010-06-10

Catalytic apparatus for vehicle

#101
20100126153
2010-05-27

INTERNAL COMBUSTION ENGINE

#102
20100108427
2010-05-06

Snowmobile exhaust system

#103
20100077742
2010-04-01

FLOW DIFFUSER FOR AN EXHAUST SYSTEM

#104
20100018192
2010-01-28

EXHAUST MANIFOLD FOR MULTI-CYLINDER ENGINE

#105
20100006370
2010-01-14

Sound-attenuating muffler having reduced back pressure

#106
20100000201
2010-01-07

Exhaust manifold

#107
20090313982
2009-12-24

Exhaust system for motorcycle

#108
20090223212
2009-09-10

System for treating exhaust gas

#109
20090159758
2009-06-25

MOUNTING STRUCTURE OF EXHAUST PIPE SYSTEM IN VEHICLE

#110
20090151334
2009-06-18

Apparatus for reducing nitrogen oxide in exhaust pipe

#111
20090107115
2009-04-30

System for treating exhaust gas

#112
20090045006
2009-02-19

Noise Eliminator for Fuel Cell

#113
20090044524
2009-02-19

Exhaust gas purification method and exhaust gas purification system

#114
20080308347
2008-12-18

Vehicular exhaust system

#115
20080302088
2008-12-11

Exhaust injector spray target

#116
20080163617
2008-07-10

POWER IMPLEMENT

#117
20080163615
2008-07-10

Internal combustion engine exhaust filter with pressure relief

#118
20080053080
2008-03-06

Housing for an exhaust gas treatment component with a reinforcing sleeve, exhaust gas treatment component, exhaust system and motor vehicle

#119
20080023265
2008-01-31

Combination Silencer

#120
20070261387
2007-11-15

MOTORCYCLE EXHAUST ENHANCEMENT DEVICE

#121
20070227810
2007-10-04

Vehicle exhaust system

#122
20070227809
2007-10-04

VEHICLE EXHAUST SYSTEM

#123
20070158136
2007-07-12

Muffler and vehicle equipped with muffler

#124
20070158135
2007-07-12

Muffler and vehicle equipped with muffler

#125
20070101707
2007-05-10

DUAL MOTORCYCLE EXHAUST SYSTEM

#126
20070095605
2007-05-03

Muffler for vehicle

#127
20060275192
2006-12-07

Method and system for injection of a solution into a gas stream

#128
20060086563
2006-04-27

Compressor discharge pulsation dampener

#129
20060037814
2006-02-23

Exhaust system of internal combustion engine

#130
20050224283
2005-10-13

Internal combustion engine silencer

#131
20050223703
2005-10-13

Muffler with catalytic converter arrangement; and method

#132
20050217931
2005-10-06

Method and apparatus for venting exhaust gas from an engine

#133
20050217227
2005-10-06

Device for cleaning vehicular exhaust gas, in particular a diesel exhaust particle filter, and vehicle comprising such device

#134
20050205355
2005-09-22

Tailpipe of automotive vehicle

#135
20050132674
2005-06-23

Particulate matter reducing apparatus

#136
20050126850
2005-06-16

Exhaust muffling device

#137
20050115763
2005-06-02

Motorcycle exhaust enhancers

#138
20050103003
2005-05-19

Exhaust gas muffler

#139
20050081515
2005-04-21

Dual motorcycle exhaust system

#140
18934428
2025-07-08

Vehicle

#141
18065215
2023-12-12

Exhaust gas burner assembly

#142
15848425
2019-01-08

Double layered, bent exhaust pipe