Granted Patent
Utility
US 4,813,260 · App. 07/045,797
Multipurpose tube working tool
Inventor:
Richard V. Strybel
Patented Case
View Patent ↗
Granted: Mar 21, 1989
Filed: Apr 27, 1987
Inventor
Richard V. Strybel
Assignee (at issue)
Clevite 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.