Granted Patent
Utility
US 6,267,652 · App. 09/641,463
Versatile ultrahone sharpener
Inventors:
Daniel D. Friel, Sr., Daniel D. Friel, Jr., Robert P. Bigliano
Patented Case
View Patent ↗
Granted: Jul 31, 2001
Filed: Aug 18, 2000
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.