Safety marker
United States Patent 2333273

Inventors:
Scanlon, Charles D.
Publication Date:
11/02/1943
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Assignee:
Roscoe, Arnold J.
Rodney, Taylor B.
Primary Class:
116/63R
Other Classes:
116/63C, D10/113, D10/109, 404/10, 116/209, 116/200
International Classes:
E01F9/012; E01F9/011