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Class Information
Number: 181/265
Name: Acoustics > Sound-modifying means > Muffler, fluid conducting type > With baffle or baffle structure > Retroverted
Description: Subject matter having a plurality of serially connected fluid passages substantially parallel to the inlet, the direction of flow of the fluid being reversed as it travels through each successive passage.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7407036 |
Muffler for compact combustion engines |
Aug. 5, 2008 |
| 7389853 |
Muffler for an engine |
Jun. 24, 2008 |
| 7380637 |
Exhaust-gas muffler |
Jun. 3, 2008 |
| 7174991 |
Muffler for internal combustion engine |
Feb. 13, 2007 |
| 6973959 |
Heat exchanger for cooling a motor vehicle exhaust gases |
Dec. 13, 2005 |
| 6802388 |
Silencer or noise damper |
Oct. 12, 2004 |
| 6745863 |
Exhaust system structure for motorcycle |
Jun. 8, 2004 |
| 6672425 |
Noise abatement module |
Jan. 6, 2004 |
| 6629580 |
Perforated end pipe of silencer unit |
Oct. 7, 2003 |
| 6571911 |
Muffler for an engine |
Jun. 3, 2003 |
| 6510921 |
Muffler/exhaust extractor |
Jan. 28, 2003 |
| 6470998 |
Modular muffler with end plate adaptors and spark arresters |
Oct. 29, 2002 |
| 6443255 |
Marine muffler |
Sep. 3, 2002 |
| 6435302 |
Motor vehicle muffler |
Aug. 20, 2002 |
| 6427802 |
Muffler |
Aug. 6, 2002 |
| 6394225 |
Muffler structure |
May. 28, 2002 |
| 6312650 |
Silencer |
Nov. 6, 2001 |
| 6199658 |
Multi-Fold side branch muffler |
Mar. 13, 2001 |
| 6189650 |
Muffler structure |
Feb. 20, 2001 |
| 6176347 |
Semi-active muffler for internal combustion engine |
Jan. 23, 2001 |
| 6173808 |
Automobile exhaust noise silencer |
Jan. 16, 2001 |
| 6102154 |
Muffler |
Aug. 15, 2000 |
| 6098745 |
Dome muffler |
Aug. 8, 2000 |
| 6052990 |
Exhaust pipe and method and system for enhancing engine performance |
Apr. 25, 2000 |
| 5984045 |
Engine exhaust noise suppressor |
Nov. 16, 1999 |
| 5971098 |
Muffler for internal combustion engine |
Oct. 26, 1999 |
| 5959263 |
Bypass muffler |
Sep. 28, 1999 |
| 5952625 |
Multi-fold side branch muffler |
Sep. 14, 1999 |
| 5929398 |
Muffler device |
Jul. 27, 1999 |
| 5917161 |
Muffler with variable damping characteristics |
Jun. 29, 1999 |
| 5898140 |
Exhaust silencing device |
Apr. 27, 1999 |
| 5824972 |
Acoustic muffler |
Oct. 20, 1998 |
| 5801344 |
Sound attenuator with throat tuner |
Sep. 1, 1998 |
| 5801343 |
Muffler for internal combustion engine |
Sep. 1, 1998 |
| 5739483 |
Automobile exhaust noise suppressor |
Apr. 14, 1998 |
| 5712454 |
Exhaust system in internal combustion engine |
Jan. 27, 1998 |
| 5708238 |
Exhaust silencing device |
Jan. 13, 1998 |
| 5708237 |
Automobile exhaust noise silencer |
Jan. 13, 1998 |
| 5677518 |
Device for deadening sound in pipelines |
Oct. 14, 1997 |
| 5659158 |
Sound attenuating device and insert |
Aug. 19, 1997 |
| 5616893 |
Reverse entry muffler with surge suppression feature |
Apr. 1, 1997 |
| 5614699 |
Automobile exhaust noise suppressor |
Mar. 25, 1997 |
| 5581056 |
Muffler |
Dec. 3, 1996 |
| 5559310 |
Muffler for air operated reciprocating pumps |
Sep. 24, 1996 |
| 5559308 |
Perpendicularly joined structure with thin-walled plates and thin-walled tubes and the method of manufacture |
Sep. 24, 1996 |
| 5550336 |
Turbine sound reducer |
Aug. 27, 1996 |
| 5521339 |
Catalyst muffler system |
May. 28, 1996 |
| 5498842 |
Muffler for an internal combustion engine |
Mar. 12, 1996 |
| 5428194 |
Narrow width stamp formed muffler |
Jun. 27, 1995 |
| 5413189 |
Sound attenuating device and insert |
May. 9, 1995 |
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