Granted Patent
Utility
US 4,454,520 · App. 06/391,799
Electrographic recorder with enhanced writing speed
Inventors:
Boyce D. Braschler, Paul A. Diddens, Roger D. Erickson, Charles J. O'Toole, Jr.
Patented Case
View Patent ↗
Granted: Jun 12, 1984
Filed: Jun 24, 1982
Inventors
Boyce D. Braschler
Paul A. Diddens
Roger D. Erickson
Charles J. O'Toole, Jr.
Assignee (at issue)
Honeywell Limited
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.