Granted Patent
Utility
US 6,132,875 · App. 08/724,323
Magnetic recording medium and magnetic head having carbon protective layers
Inventors:
Katsumi Kiuchi, Eishin Yamakawa, Yoshito Kitamoto, Makoto Watanabe, Masahiro Takagi, Akira Kikuchi
Patented Case
View Patent ↗
Granted: Oct 17, 2000
Filed: Oct 1, 1996
Inventors
Katsumi Kiuchi
Eishin Yamakawa
Yoshito Kitamoto
Makoto Watanabe
Masahiro Takagi
Akira Kikuchi
Assignee (at issue)
Fujitsu Limited
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.