Rock drill
United States Patent 2051053

Inventors:
Charles, Morris
Publication Date:
08/18/1936
View Patent Images:
Download PDF 2051053 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
NAT ROCK DRILL COMPANY
Primary Class:
173/97
Other Classes:
173/78, 173/205
International Classes:
B25D11/08; B25D11/00