Granted Patent
Utility
US 4,592,141 · App. 06/547,046
Self-sharpening cutting implement and method of making the same
Inventor:
Sol Levine
Patented Case
View Patent ↗
Granted: Jun 3, 1986
Filed: Oct 31, 1983
Inventor
Sol Levine
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.