Patents-Review.com
ClassID:

138138 ⎘

F01N2490/15 - CPC Classification

Classification description:

Structure, disposition or shape of gas-chambers Plurality of resonance or dead chambers

Sub-classes:
Recent Application in this class:
#1
20250116216
2025-04-10

MUFFLER

 #2
20250067201
2025-02-27

Dual Mode Muffler

 #3
20240418111
2024-12-19

SOUND ATTENUATING ENGINE EXHAUST SYSTEM

 #4
20240102408
2024-03-28

MUFFLER FOR GENERATING A SPORTY AND RHYTHMIC SOUND AND A VEHICLE EQUIPPED WITH THE SAME

 #5
20230392827
2023-12-07

Muffler with metallic meshed rings

 #6
20230160325
2023-05-25

Exhaust system tuner tube to reduce standing wave

 #7
20230024144
2023-01-26

Muffler

 #8
20220341352
2022-10-27

EXHAUST COMPONENT WITH FLEXIBLE MEMBRANE

 #9
20220275738
2022-09-01

Acoustically tuned muffler

 #10
20210231035
2021-07-29

Sound attenuating engine exhaust system

 #11
20210215146
2021-07-15

Muffler, compressor assembly, and refrigerator

 #12
20210207507
2021-07-08

Muffler with internally supported tuner

 #13
20210115822
2021-04-22

Muffler

 #14
20210080151
2021-03-18

Muffler with metallic meshed rings

 #15
20200408130
2020-12-31

Exhaust gas aftertreatment device

 #16
20200386132
2020-12-10

Exhaust sound attenuation device

 #17
20200347761
2020-11-05

Exhaust muffler for an exhaust system of an internal combustion engine

 #18
20200240299
2020-07-30

Multi-chambered sound attenuation with resonant frequency targeting

 #19
20200088077
2020-03-19

SILENCER FOR AN EXHAUST GAS SYSTEM OF A MOTOR VEHICLE AND MOTOR VEHICLE WITH A SILENCER

 #20
20190323396
2019-10-24

Muffler comprising a Helmholtz resonator and a vehicle comprising such a muffler

 #21
20190203619
2019-07-04

Exhaust system having tunable exhaust sound

 #22
20190136740
2019-05-09

Exhaust silencer device

 #23
20190107019
2019-04-11

Acoustically tuned muffler

 #24
20190024549
2019-01-24

Method for forming a collar in a muffler housing

 #25
20180149052
2018-05-31

Acoustic attenuator for damping pressure vibrations in an exhaust system of an engine, an acoustic attenuation system using the attenuators, and method of damping pressure vibrations in an exhaust system of an engine

 #26
20160333756
2016-11-17

Muffler

 #27
20160281557
2016-09-29

Silencer for internal combustion engine

 #28
20160273424
2016-09-22

MOUNTING STRUCTURE OF VARIABLE VALVE FOR DUAL EXHAUST SYSTEM

 #29
20160245140
2016-08-25

Exhaust gas duct system for an internal combustion engine

 #30
20160169078
2016-06-16

Exhaust gas system of a motor vehicle

 #31
20160169070
2016-06-16

Exhaust pipe

 #32
20150354421
2015-12-10

Muffler

 #33
20140144721
2014-05-29

Muffler for motor vehicle

 #34
20130213734
2013-08-22

Horizontally installed muffler having sporty tone

 #35
20130042600
2013-02-21

Sound attenuating heat exchanger for an internal combustion engine

 #36
20120138383
2012-06-07

Radiated sound reducing structure

 #37
20110192677
2011-08-11

Exhaust muffler device

 #38
20110127107
2011-06-02

Acoustic resonator and sound chamber

 #39
20080308348
2008-12-18

Exhaust System for Internal Combustion Engines

 #40
20080035420
2008-02-14

Muffler of internal combustion engine

 #41
20070102236
2007-05-10

Muffler

 #42
20070045041
2007-03-01

Muffler for an exhaust system

 #43
20050115764
2005-06-02

Muffler

 #44
20050042950
2005-02-24

Drainage structure of exhaust resonator