Granted Patent
Utility
US 5,943,179 · App. 08/747,296
Disk drive apparatus and head switching method
Inventor:
Yukio Fukushima
Patented Case
View Patent ↗
Granted: Aug 24, 1999
Filed: Nov 12, 1996
Inventor
Yukio Fukushima
Assignee (at issue)
International Business Machines 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.