Granted Patent
Utility
US 4,271,559 · App. 06/080,898
Toner clean-off head
Inventor:
John Blumenthal
Patented Case
View Patent ↗
Granted: Jun 9, 1981
Filed: Oct 1, 1979
Inventor
John Blumenthal
Assignee (at issue)
Gould Inc.
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.