Granted Patent
Utility
US 4,921,132 · App. 07/221,711
Ink motor system
Inventors:
R. Langdon Wales, H. W. Crowley
Patented Case
View Patent ↗
Granted: May 1, 1990
Filed: Jul 20, 1988
Inventors
R. Langdon Wales
H. W. Crowley
Assignee (at issue)
Automaton, 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.