Granted Patent
Utility
US 4,355,266 · App. 06/174,042
Eddy current servo system for controlling the rotation of disk packs
Inventor:
Willard Pearson
Patented Case
View Patent ↗
Granted: Oct 19, 1982
Filed: Jul 31, 1980
Inventor
Willard Pearson
Assignee (at issue)
Ampex 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.