Granted Patent
Utility
US 4,270,868 · App. 05/954,374
Digital pulse-width modulated printer escapement control system
Inventors:
David Morgan, Robert F. Pan, Paul A. Quinn, Jr., Glenn S. Westerman
Patented Case
View Patent ↗
Granted: Jun 2, 1981
Filed: Oct 24, 1978
Inventors
David Morgan
Robert F. Pan
Paul A. Quinn, Jr.
Glenn S. Westerman
Assignee (at issue)
International Business Machines Corporation
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.