Valve stem
United States Patent 1444189

Inventors:
Key, James F.
Publication Date:
02/06/1923
View Patent Images:
Download PDF 1444189 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
First, Trust
Savings, Bank
Primary Class:
251/238
Other Classes:
137/901
International Classes:
F16K41/18; F16K41/00