Granted Patent
Utility
US 4,349,178 · App. 06/174,452
Wire blades
Inventor:
Frederick Schmid
Patented Case
View Patent ↗
Granted: Sep 14, 1982
Filed: Aug 1, 1980
Inventor
Frederick Schmid
Assignee (at issue)
Crystal Systems 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.