Pumping apparatus
United States Patent 1750170

Inventors:
August, Frisch
Publication Date:
03/11/1930
View Patent Images:
Download PDF 1750170 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
August, Frisch
Primary Class:
417/238
Other Classes:
417/465, 137/340, 137/341, 165/120
International Classes:
F04B1/00; F04B53/08; F04B53/00