Title:
Safety casing head for oil wells
Document Type and Number:
United States Patent 1819875
Inventors:
Stokes, Cunningham Marion
Plaque It!
Sponsored by: Flash of Genius |
Publication Date:
08/18/1931
View Patent Images:
Images are available in PDF form when logged in. To view PDFs, Login or
Create Account (Free!)
Referenced by:
Export Citation:
Assignee:
Stokes, Cunningham Marion
Primary Class:
Other Classes:
277/325, 251/231, 92/72, 251/58
International Classes:
E21B33/06; E21B33/03