Granted Patent
Utility
US 5,868,611 · App. 08/889,768
Versatile manual sharpener
Inventor:
Daniel D. Friel, Sr.
Patented Case
View Patent ↗
Granted: Feb 9, 1999
Filed: Jul 8, 1997
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.