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United States Patent 2266865
Inventors:
Herrington, Ralph J.
Publication Date:
12/23/1941
View Patent Images:
Download PDF 2266865
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Assignee:
Herrington, Ralph J.
Primary Class:
74/140
Other Classes:
123/185.300, 123/185.200
International Classes:
F02N3/02
;
F02N3/00