Granted Patent
Utility
US 5,404,259 · App. 07/966,354
Magnetic head having high wear resistance and non-magnetic substrate used in the magnetic head
Inventors:
Nobuyuki Ishiwata, Toshiyuki Okumura, Haruo Urai, Mitsuo Tamura, Masataka Konno
Patented Case
View Patent ↗
Granted: Apr 4, 1995
Filed: Oct 26, 1992
Inventors
Nobuyuki Ishiwata
Toshiyuki Okumura
Haruo Urai
Mitsuo Tamura
Masataka Konno
Assignees (at issue)
NEC CORPORATION
TOKIN 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.