Granted Patent
Utility
US 4,428,260 · App. 06/353,464
Method of forming a cutting edge
Inventor:
Richard R. Eby
Patented Case
View Patent ↗
Granted: Jan 31, 1984
Filed: Mar 1, 1982
Inventor
Richard R. Eby
Assignee (at issue)
Sperry Corp.
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.