ClassID:

141036

F02M35/1261 - CPC Classification

Classification description:

Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines; Intake silencers Sound modulation, transmission or amplification using resonance Helmholtz resonators

Recent Application in this class:
#1
20260153068
2026-06-04

RESONATOR-INTEGRATED DUCT AND METHOD FOR MANUFACTURING RESONATOR- INTEGRATED DUCT

#2
20250389243
2025-12-25

RESONATOR FOR VEHICLE

#3
20250027469
2025-01-23

AIR INDUCTION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE

#4
20240044306
2024-02-08

Turbocharger air intake silencer with adjustable cavity space structure

#5
20210293210
2021-09-23

Broad-band resonance silencer, in particular for a motor vehicle engine

#6
20200191103
2020-06-18

Turbocharger system including acoustic damper for attenuating aerodynamically generated noise from compressor

#7
20200158059
2020-05-21

Rectification structural body

#8
20190203681
2019-07-04

Engine intake air duct

#9
20190120187
2019-04-25

Vacuum actuated multi-frequency quarter-wave resonator for an internal combustion engine

#10
20180340498
2018-11-29

Air cleaner of internal combustion engine

#11
20180245555
2018-08-30

Tunable injection molded resonator

#12
20180245554
2018-08-30

Vehicle silencer

#13
20180245553
2018-08-30

Vehicular resonator

#14
20180142588
2018-05-24

Silencer and vehicle engine including same

#15
20180135573
2018-05-17

Vacuum actuated multi-frequency quarter-wave resonator for an internal combustion engine

#16
20180128218
2018-05-10

Air cleaner for internal combustion engine

#17
20180112636
2018-04-26

Internal combustion engine provided with a device for the amplification of the intake sound

#18
20170175690
2017-06-22

Intake sound reduction device for internal combustion engine

#19
20170045021
2017-02-16

Tunable injection molded resonator

#20
20160377037
2016-12-29

Variable intake system

#21
20160281660
2016-09-29

Multi-frequency quarter-wave resonator for an internal combustion engine

#22
20160230719
2016-08-11

INTAKE NOISE REDUCING APPARATUS FOR INTERNAL COMBUSTION ENGINE

#23
20160201621
2016-07-14

Resonator

#24
20160195049
2016-07-07

Silencer

#25
20160160818
2016-06-09

Air induction system having an acoustic resonator

#26
20160160802
2016-06-09

Blow-by gas treatment device for internal combustion engine

#27
20160160717
2016-06-09

Silencer for an internal combustion engine of a motor vehicle

#28
20150361934
2015-12-17

Multi-frequency quarter-wave resonator for an internal combustion engine vehicle

#29
20150107935
2015-04-23

Intake system having a silencer device

#30
20150096520
2015-04-09

Vehicular air intake apparatus

#31
20140338628
2014-11-20

Torque increase resonator

#32
20140053559
2014-02-27

Near-wall roughness for damping devices reducing pressure oscillations in combustion systems

#33
20130263822
2013-10-10

Wide-band damper for charge air lines of an internal combustion engine with turbocharger

#34
20130263810
2013-10-10

Multi-mode air induction tuning duct

#35
20130118434
2013-05-16

Chamber air cleaner and an intake apparatus for engine including the same

#36
20130111901
2013-05-09

PULSATION ABSORPTION SYSTEM FOR AN ENGINE

#37
20130008738
2013-01-10

Sound transmission system

#38
20130008737
2013-01-10

Control device of a motor vehicle

#39
20130008402
2013-01-10

Sound transmission system

#40
20120085308
2012-04-12

Air intake with air mass sensor and sound dampening resonator

#41
20110097194
2011-04-28

Radial Compressor

#42
20110061970
2011-03-17

Accoustic attenuation device for an intake line of a combustion engine and intake line incorporating same

#43
20100193283
2010-08-05

Noise reduction system

#44
20090314241
2009-12-24

AIR INDUCTION HOUSING HAVING AN AUXILIARY TUNING VOLUME FOR ENHANCING ATTENUATION AND BROADENING THE BANDWIDTH OF A PRIMARY SOUND ATTENUATOR

#45
20090241888
2009-10-01

Air induction housing having a perforated wall and interfacing sound attenuation chamber

#46
20090236172
2009-09-24

Air induction sound modification system for internal combustion engine

#47
20090194056
2009-08-06

Intake system with resonator

#48
20090114476
2009-05-07

Vehicle resonator structure and attachment method

#49
20090071432
2009-03-19

Intake system

#50
20090008181
2009-01-08

MOTORCYCLE AIRBOX WITH A HELMHOLTZ RESONATOR

#51
20080308061
2008-12-18

Resonator

#52
20080236937
2008-10-02

Resonator with internal supplemental noise attenuation device

#53
20080173271
2008-07-24

Adjustable helmholtz resonator

#54
20080135010
2008-06-12

Intake assembly having Helmholtz resonators

#55
20070295554
2007-12-27

Sound Proofing Device and Device for Conducting a Fluid

#56
20070044747
2007-03-01

Air intake sound control structure

#57
20060032700
2006-02-16

Noise reduction technique for snowmobiles

#58
20050284692
2005-12-29

Silencer for air induction system and high flow articulated coupling

#59
20050252716
2005-11-17

Electronically controlled dual chamber variable resonator

#60
20050217626
2005-10-06

Resonator

#61
20050205354
2005-09-22

Dual chamber variable geometry resonator

#62
20050199439
2005-09-15

Variable geometry resonator for acoustic control

#63
17693826
2023-03-07

Air intake plenum for attenuating sound from a marine engine

#64
17081388
2022-06-14

Air intake plenum for attenuating sound from a marine engine

#65
15174201
2019-07-09

Intake systems for stern drives having intake silencers

#66
15041140
2017-03-28

Acoustic resonator having a partitioned neck