Title:
Piercing point
United States Patent 1950938
Inventors:
Dunn, John J.
Wright, Edwin C.
Publication Date:
03/13/1934
Export Citation:
Click for automatic bibliography generation
Assignee:
NAT TUBE CO
Primary Class:
72/463
Other Classes:
72/97, 72/478, 72/479, 72/482.94
International Classes:
B21B25/00; B21B25/00
View Patent Images:
Download PDF 1950938        PDF help