Granted Patent
Utility
US 3,958,634 · App. 05/302,425
Welded wire well screen on perforated casing
Inventor:
Howard Smith
Patented Case
View Patent ↗
Granted: May 25, 1976
Filed: Oct 31, 1972
Inventor
Howard Smith
Assignee (at issue)
Howard Smith Company
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.