Title:
Method and device for muffling the noise of the exhaust gases of internal-combustion engines
United States Patent 1490957

Inventors:
Isaac, Birger
Publication Date:
04/22/1924
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Assignee:
Richard, Ernst
Primary Class:
181/265
Other Classes:
181/283, 181/274, 55/DIG.021
International Classes:
F01N1/18; F01N1/16