Granted Patent
Utility
US 4,518,972 · App. 06/633,174
Graphics plotter turret head
Inventors:
Charles Gunderson, Henry W. Hammond
Patented Case
View Patent ↗
Granted: May 21, 1985
Filed: Jul 23, 1984
Inventors
Charles Gunderson
Henry W. Hammond
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.