Granted Patent
Utility
US 5,325,349 · App. 07/887,824
Hard disc drive and a servo signal writing apparatus
Inventor:
Kayoko Taniguchi
Patented Case
View Patent ↗
Granted: Jun 28, 1994
Filed: May 26, 1992
Inventor
Kayoko Taniguchi
Assignee (at issue)
Sony Magnescale Inc.
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.