Patents-Review.com
ClassID:

137748 ⎘

F01N1/06 - CPC Classification

Classification description:

Silencing apparatus characterised by method of silencing by using interference effect

Sub-classes:
Recent Application in this class:
#1
20240418111
2024-12-19

SOUND ATTENUATING ENGINE EXHAUST SYSTEM

 #2
20240183293
2024-06-06

AIR AMPLIFIER WITH NOISE SUPPRESSION

 #3
20240077008
2024-03-07

AIR-TRANSPARENT SELECTIVE SOUND SILENCER USING ULTRA-OPEN METAMATERIAL

 #4
20230304425
2023-09-28

DRONE ELIMINATION MUFFLER

 #5
20220298940
2022-09-22

Noise abatement system for internal combustion engines

 #6
20220228521
2022-07-21

Systems and methods for equalizing backpressure in engine cylinders

 #7
20220178298
2022-06-09

System and method for a cab-mounted muffler assembly

 #8
20220042430
2022-02-10

Exhauster assembly for a vehicle

 #9
20210231036
2021-07-29

MUFFLER SYSTEM

 #10
20210231035
2021-07-29

Sound attenuating engine exhaust system

 #11
20210123364
2021-04-29

Sound suppressor

 #12
20210087957
2021-03-25

Air-transparent selective sound silencer using ultra-open metamaterial

 #13
20200400060
2020-12-24

Exhaust system and muffler

 #14
20200386132
2020-12-10

Exhaust sound attenuation device

 #15
20200300150
2020-09-24

Systems and methods for equalizing backpressure in engine cylinders

 #16
20200123946
2020-04-23

Drone elimination muffler

 #17
20200049161
2020-02-13

Compressor diffuser with diffuser pipes varying in natural vibration frequencies

 #18
20200043456
2020-02-06

Air-transparent selective sound silencer using ultra-open metamaterial

 #19
20200018204
2020-01-16

ANTI-RESONANCE MUFFLER

 #20
20190085744
2019-03-21

Exhaust device for internal combustion engine

 #21
20190078476
2019-03-14

Exhaust device for internal combustion engine

 #22
20190063297
2019-02-28

Exhaust sound generating apparatus of vehicle

 #23
20190055866
2019-02-21

Exhaust device for internal combustion engine

 #24
20190032536
2019-01-31

Systems and methods for equalizing backpressure in engine cylinders

 #25
20190032530
2019-01-31

Combined exhaust gas silencer

 #26
20180320646
2018-11-08

Road vehicle with an internal combustion engine and provided with an exhaust noise transmission device

 #27
20180291795
2018-10-11

Vehicle exhaust assembly

 #28
20180202344
2018-07-19

Exhaust system for an internal combustion automotive engine

 #29
20180016954
2018-01-18

Exhaust-gas system

 #30
20170350287
2017-12-07

Road vehicle with an internal combustion engine and provided with a device for the transmission of the exhaust noise

 #31
20170314434
2017-11-02

Exhaust gas aftertreatment device and exhaust gas aftertreatment method

 #32
20170159519
2017-06-08

PNEUMATIC TOOL SOUND DAMPENING SYSTEM

 #33
20170145882
2017-05-25

Drone elimination muffler

 #34
20160298510
2016-10-13

Drone elimination muffler

 #35
20160090884
2016-03-31

Muffler for an exhaust system of an internal combustion engine

 #36
20150047921
2015-02-19

Fluid flow noise mitigation structure and method

 #37
20140376733
2014-12-25

System for influencing exhaust noise in a multi-flow exhaust system

 #38
20140048350
2014-02-20

Muffler for an exhaust system of an internal combustion engine

 #39
20130255226
2013-10-03

Exhaust apparatus for internal combustion engine

 #40
20130092471
2013-04-18

Active sound absorbers

 #41
20120273302
2012-11-01

Exhaust apparatus of internal combustion engine

 #42
20120168245
2012-07-05

Exhaust pipe part and exhaust apparatus for internal combustion engine

 #43
20120138384
2012-06-07

Exhaust apparatus for an internal combustion engine

 #44
20120137666
2012-06-07

Exhaust gas apparatus of an internal combustion engine

 #45
20100192558
2010-08-05

Exhaust device for vehicle internal combustion engine

 #46
20100192557
2010-08-05

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

 #47
20100192556
2010-08-05

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

 #48
20100192553
2010-08-05

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

 #49
20090308686
2009-12-17

Venturi muffler

 #50
20090007565
2009-01-08

Turbo charge system of an engine

 #51
20080011541
2008-01-17

Internal combustion engine

 #52
20070178352
2007-08-02

Fuel cell system with muffler

 #53
20070107982
2007-05-17

Flow-through sound-cancelling mufflers

 #54
20070034444
2007-02-15

Reflecting plate type silencer pipe

 #55
20070029133
2007-02-08

Device for modulating noise in a motor vehicle

 #56
20060283661
2006-12-21

Silencer

 #57
20060090957
2006-05-04

Exhaust muffler

 #58
20060021507
2006-02-02

Particulate trap with selective blocking element

 #59
20050284692
2005-12-29

Silencer for air induction system and high flow articulated coupling

 #60
20050279569
2005-12-22

Interference-based exhaust noise attenuation

 #61
20050224283
2005-10-13

Internal combustion engine silencer

 #62
20050205352
2005-09-22

Exhaust chamber comprising an envelope defining a gas circulation passage

 #63
20050155817
2005-07-21

Muffler for internal combustion motor vehicles

 #64
20050023078
2005-02-03

Tuned exhaust system for small engines

 #65
20050016792
2005-01-27

Noise suppressor apparatus for a gas duct

 #66
20050011700
2005-01-20

Devices for regulating pressure and flow pulses

 #67
20050000743
2005-01-06

Herschel-Quincke tube arrangements for motor vehicles

 #68
15046891
2017-04-18

Multi-muffler sound attenuator assembly