Granted Patent
Utility
US 6,444,290 · App. 09/329,150
Magnetic recording medium comprising a support containing a specific size filler and having a specific concentration of surface protrusions
Inventors:
Masatoshi Takahashi, Hitoshi Noguchi, Junichi Nakamikawa
Patented Case
View Patent ↗
Granted: Sep 3, 2002
Filed: Jun 9, 1999
Inventors
Masatoshi Takahashi
Hitoshi Noguchi
Junichi Nakamikawa
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.