Granted Patent
Utility
US 4,439,800 · App. 06/257,484
Servo control of seek operation in magnetic disk drive
Inventor:
Steven H. Powell
Patented Case
View Patent ↗
Granted: Mar 27, 1984
Filed: Apr 24, 1981
Inventor
Steven H. Powell
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.