Granted Patent
Utility
US 6,012,971 · App. 09/039,128
Sharpening apparatus
Inventors:
Daniel D. Friel, Sr., Daniel D. Friel, Jr., Robert P. Bigliano
Patented Case
View Patent ↗
Granted: Jan 11, 2000
Filed: Mar 13, 1998
Inventors
Daniel D. Friel, Sr.
Daniel D. Friel, Jr.
Robert P. Bigliano
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.