Granted Patent
Utility
US 4,724,370 · App. 06/918,501
Servo system for a disk drive
Inventors:
Alex Moraru, Kechen Cheng
Patented Case
View Patent ↗
Granted: Feb 9, 1988
Filed: Oct 14, 1986
Inventors
Alex Moraru
Kechen Cheng
Assignee (at issue)
Konishiroku Photo Industries Co., Ltd.
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.