Title:
Valve piston and barrel construction for hypodermic syringes
Document Type and Number:
United States Patent 1578517
Inventors:
Hein, George N.
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Publication Date:
03/30/1926
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Assignee:
Hein, George N.
Primary Class:
Other Classes:
92/249, 92/112, 604/184, 604/900
International Classes:
A61M5/20