Casing head for oil wells
United States Patent 1727583

Inventors:
Cant, David A.
Publication Date:
09/10/1929
View Patent Images:
Download PDF 1727583 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
REGAN FORGE & ENGINEERING COMP
Primary Class:
166/88.300
Other Classes:
277/328
International Classes:
E21B33/06; E21B33/03