Granted Patent
Utility
US 6,635,367 · App. 09/941,798
Magnetic recording medium
Inventors:
Masukazu Igarashi, Fumiko Akagi, Hideki Zaitsu, Futoshi Tomiyama
Patented Case
View Patent ↗
Granted: Oct 21, 2003
Filed: Aug 30, 2001
Inventors
Masukazu Igarashi
Fumiko Akagi
Hideki Zaitsu
Futoshi Tomiyama
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.