F01N2490/20 - CPC Classification Index

ClassID:

138142 ⎘

F01N2490/20 - CPC Classification

Classification description:

Structure, disposition or shape of gas-chambers Chambers being formed inside the exhaust pipe without enlargement of the cross section of the pipe, e.g. resonance chambers

Recent Application in this class:

20260092545

2026-04-02

EXHAUST MUFFLER

20250360999

2025-11-27

EXHAUST HANDLING SYSTEMS FOR MARINE VESSELS AND RELATED METHODS

20240286726

2024-08-29

EXHAUST HANDLING SYSTEMS FOR MARINE VESSELS AND RELATED METHODS

20190032530

2019-01-31

Combined exhaust gas silencer

20180266301

2018-09-20

Muffler

20170219153

2017-08-03

Sound suppression apparatus

20160341084

2016-11-24

Engine system with turbulence assisted damping of low frequency sound

20150204280

2015-07-23

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

20150004015

2015-01-01

Sound absorber for refrigerant compressor

#10

20120138383

2012-06-07

Radiated sound reducing structure

#11

20110107749

2011-05-12

EXHAUST GAS PURIFICATION SYSTEM FOR INTERNAL COMBUSTION ENGINE

#12

20110088968

2011-04-21

Sound absorber for a pipe-shaped, cavity-forming body

#13

20090223740

2009-09-10

Silencer of exhaust gases, in particular for motor vehicles

#14

20050223703

2005-10-13

Muffler with catalytic converter arrangement; and method

#15

18369485

2024-07-23

Exhaust handling systems for marine vessels and related methods