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Class Information
Number: 181/244
Name: Acoustics > Sound-modifying means > Muffler, fluid conducting type > Corrosion prevention
Description: Subject matter comprising means for preventing chemical erosion of the material of which the device is made.










Sub-classes under this class:

Class Number Class Name Patents
181/245 Internally coated parts 8
181/246 Nonmetallic 29


Patents under this class:

Patent Number Title Of Patent Date Issued
7938226 Exhaust system for internal combustion engine having temperature variable acoustics May. 10, 2011
7743883 Noise eliminator for fuel cell Jun. 29, 2010
7166367 Titanium alloy having excellent high-temperature oxidation and corrosion resistance Jan. 23, 2007
6668972 Bumper/muffler assembly Dec. 30, 2003
6582835 Coated ferrite stainless steel sheet usable in the automobile exhaust sector Jun. 24, 2003
6531091 Muffler made of a titanium alloy Mar. 11, 2003
5739485 Motor vehicle exhaust muffler Apr. 14, 1998
5477014 Muffler device for internal combustion engines Dec. 19, 1995
4909346 Jet engine noise suppression system Mar. 20, 1990
4851298 Multi-layer tube of a muffler for an internal combustion engine Jul. 25, 1989
4729929 Highly corrosion resistant aluminized steel sheet for the manufacture of parts of exhaust gas system Mar. 8, 1988
4695516 Heat resistant precoated steel sheet and process for the production thereof Sep. 22, 1987
4598791 Exhaust silencer Jul. 8, 1986
4550799 Muffler for exhaust gases Nov. 5, 1985
4527659 Thermally-responsive muffler drainhole valve mechanism Jul. 9, 1985
4421202 Sound attenuator Dec. 20, 1983
4402714 Method for retarding corrosion in mufflers Sep. 6, 1983
4341842 Method of coating automotive parts with silicone compositions Jul. 27, 1982
4249375 Heat exchanger Feb. 10, 1981
4239091 Muffler Dec. 16, 1980
4064963 Exhaust for internal-combustion engine Dec. 27, 1977
4026381 Exhaust system cover assembly May. 31, 1977











 
 
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