Process of producing seamless internally-ribbed tubes
United States Patent 1465073

Inventors:
Davis, Leonard D.
Publication Date:
08/14/1923
View Patent Images:
Download PDF 1465073 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
Davis, Leonard D.
Primary Class:
72/97
International Classes:
B21B19/04; B21B19/00