Granted Patent
Utility
US 4,615,295 · App. 06/721,782
Doctor blade apparatus for coating apparatus
Inventor:
Eugene W. Wittkopf
Patented Case
View Patent ↗
Granted: Oct 7, 1986
Filed: Apr 10, 1985
Inventor
Eugene W. Wittkopf
Assignee (at issue)
Magna-Graphics 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.