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Class Information
Number: 55/DIG.21
Name: Gas separation > Silencer cleaner

Patents under this class:

Patent Number Title Of Patent Date Issued
8262788 Air filter housing for a compact air filter element Sep. 11, 2012
7879142 Cyclone dust collector and vacuum cleaner Feb. 1, 2011
7637991 Cyclonic separating apparatus Dec. 29, 2009
7287503 Engine air intake apparatus Oct. 30, 2007
6875259 Low cost combined air cleaner and resonator assembly Apr. 5, 2005
6361590 Low noise air cleaner Mar. 26, 2002
6009846 Combination air-filter/air-oil separator with integral vacuum regulator Jan. 4, 2000
5792247 Integrated resonator and filter apparatus Aug. 11, 1998
5479907 Combination in-line air-filter/air-oil separator/air-silencer with preseparator Jan. 2, 1996
5417727 Noise attenuating air cleaner assembly for an internal combustion engine May. 23, 1995
5140957 Combination in line air-filter/air-oil separator/air-silencer Aug. 25, 1992
5038815 Scrubber and muffler for exhaust gas from gas-powered valve actuators Aug. 13, 1991
4971612 Reclassifying silencer Nov. 20, 1990
4458680 Protective supplied breathing air garment Jul. 10, 1984
4411264 Supplied air respirator Oct. 25, 1983
4361423 Combination acoustical muffler and exhaust converter Nov. 30, 1982
4286976 Combined sound damper and oil trap for a compressed air apparatus Sep. 1, 1981
4197922 Air intake pipe for an internal combustion engine Apr. 15, 1980
4089663 Pulsation and noise suppressor assembly with air filter May. 16, 1978
4065276 Air-cleaner Dec. 27, 1977
4042355 Pollution control device Aug. 16, 1977
4032310 Muffler and exhaust gas purifier for internal combustion engines Jun. 28, 1977
3970439 Particle separator Jul. 20, 1976
3964888 Vacuum sweeper Jun. 22, 1976

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