Granted Patent
Utility
US 4,885,517 · App. 07/208,894
Voice coil actuator positioning amplifier
Inventor:
John L. Pennock
Patented Case
View Patent ↗
Granted: Dec 5, 1989
Filed: Jun 20, 1988
Inventor
John L. Pennock
Assignee (at issue)
Seagate Technology LLC
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.