D-top and method of making the same
United States Patent 1908305

Inventors:
Bergmann, William H.
Publication Date:
05/09/1933
View Patent Images:
Download PDF 1908305 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
AMERICAN FORK & HOE CO
Primary Class:
294/57
Other Classes:
29/463
International Classes:
A01B1/02; B21D53/00; A01B1/00