Granted Patent
Utility
US 4,520,372 · App. 06/538,875
Plotter paper loading assist apparatus
Inventor:
Dean-Yuan Liu
Patented Case
View Patent ↗
Granted: May 28, 1985
Filed: Oct 4, 1983
Inventor
Dean-Yuan Liu
Assignee (at issue)
Sanders GmbH
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.