Granted Patent
Utility
US 6,661,613 · App. 10/318,114
Magnetic disk drive
Inventors:
Yohji Maruyama, Hiroshi Ikekame, Hisashi Takano
Patented Case
View Patent ↗
Granted: Dec 9, 2003
Filed: Dec 13, 2002
Inventors
Yohji Maruyama
Hiroshi Ikekame
Hisashi Takano
Assignee (at issue)
HITACHI, 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.