Granted Patent
Utility
US 5,094,565 · App. 07/621,986
Multi-head cutting tool and method for its use
Inventor:
Henry Johnson
Patented Case
View Patent ↗
Granted: Mar 10, 1992
Filed: Dec 4, 1990
Inventor
Henry Johnson
Assignee (at issue)
Surface Preparation Technologies, LLC
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.