Title:
MUFFLER
United States Patent 3521429

Inventors:
Leffler, Frank B.
Publication Date:
07/21/1970
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Assignee:
Frank, Leffler B.
Primary Class:
96/383
Other Classes:
60/297, 55/520, 60/311, 181/244, 181/231, 55/527, 181/256, 55/524, 55/485, 60/295
International Classes:
F01N3/022; F01N3/08; F01N7/18; F02B75/10; B01D46/00; F01N3/02
US Patent References:
3147097Engine exhaust cleaner and muffler
3181646Silencer having contiguous concentric layers of sound absorbent material




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