Granted Patent
Utility
US 4,577,244 · App. 06/560,715
Techniques for disk servo
Inventor:
Ashraf I. El-Sadi
Patented Case
View Patent ↗
Granted: Mar 18, 1986
Filed: Dec 12, 1983
Inventor
Ashraf I. El-Sadi
Assignee (at issue)
Memorex 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.