Granted Patent
Utility
US 6,707,643 · App. 09/951,382
Perpendicular magnetic recording head having narrow recording gap and perpendicular magnetic recording apparatus using the same
Inventors:
Akihiko Takeo, Tetsuya Roppongi, Shinichi Horinouchi, Haruyuki Morita, Mikio Matsuzaki
Patented Case
View Patent ↗
Granted: Mar 16, 2004
Filed: Sep 14, 2001
Inventors
Akihiko Takeo
Tetsuya Roppongi
Shinichi Horinouchi
Haruyuki Morita
Mikio Matsuzaki
Assignees (at issue)
Kabushiki Kaisha Toshiba
TDK 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.