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Class Information
Number: 181/404
Name: Acoustics > Hobby craft engine muffler
Description: Disclosures of toy engines or hobby craft-type engines with sound attenuating mufflers.

Patents under this class:

Patent Number Title Of Patent Date Issued
8400879 Seismic sensor array devices and methods of data collection Mar. 19, 2013
5611409 Exhaust muffler for small internal combustion engine Mar. 18, 1997
4858722 Self-contained muffler attachment and conversion kit for small two-cycle engines Aug. 22, 1989
4090583 Streamlined monolithic internal combustion engine muffler May. 23, 1978
4031979 Adjustable muffler for model aircraft type engines Jun. 28, 1977

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