Title:
Duct joint construction
United States Patent 1935690

Inventors:
Zack, Hans J.
Publication Date:
11/21/1933
View Patent Images:
Download PDF 1935690 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
Zack, Hans J.
Primary Class:
285/331
Other Classes:
138/DIG.004, 285/424, 285/370
International Classes:
F16L23/14; F16L23/00