Granted Patent
Utility
US 4,375,069 · App. 06/257,469
Programmable format sequencer for disk drive
Inventors:
Eric J. Halvorsen, David T. Cornaby
Patented Case
View Patent ↗
Granted: Feb 22, 1983
Filed: Apr 24, 1981
Inventors
Eric J. Halvorsen
David T. Cornaby
Assignee (at issue)
IO-Mega Holding 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.