Granted Patent
Utility
US 4,498,548 · App. 06/505,981
Well jar incorporating elongate resilient vibration snubbers and mounting apparatus therefor
Inventor:
Chuan C. Teng
Patented Case
View Patent ↗
Granted: Feb 12, 1985
Filed: Jun 20, 1983
Inventor
Chuan C. Teng
Assignee (at issue)
Dailey Petroleum Services Corp.
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.