Granted Patent
Utility
US 4,394,883 · App. 06/203,527
Well jar
Inventor:
Edward L. Briscoe
Patented Case
View Patent ↗
Granted: Jul 26, 1983
Filed: Nov 3, 1980
Inventor
Edward L. Briscoe
Assignee (at issue)
Dailey Oil Tools, Inc.
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.