Attachment for rotary drills or the like
United States Patent 2282728

Inventors:
Kern, Joseph W.
Publication Date:
05/12/1942
View Patent Images:
Download PDF 2282728 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
Kern, Joseph W.
Primary Class:
30/392
Other Classes:
74/50, 30/500
International Classes:
B23D57/00