Granted Patent
Utility
US 6,726,551 · App. 10/023,190
Manual knife sharpener with angle control
Inventor:
Daniel D. Friel, Sr.
Patented Case
View Patent ↗
Granted: Apr 27, 2004
Filed: Dec 18, 2001
Inventor
Daniel D. Friel, Sr.
Assignee (at issue)
EDGECRAFT CORPORATION
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.