Granted Patent
Utility
US 4,593,293 · App. 06/536,488
X, Y plotter
Inventor:
Richard M. Higa
Patented Case
View Patent ↗
Granted: Jun 3, 1986
Filed: Sep 28, 1983
Inventor
Richard M. Higa
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.