Granted Patent
Utility
US 5,592,965 · App. 08/289,016
Valve stop changer
Inventor:
Kenneth E. Rakieski
Patented Case
View Patent ↗
Granted: Jan 14, 1997
Filed: Aug 11, 1994
Inventor
Kenneth E. Rakieski
Assignee (at issue)
Dresser Industries, 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.