Granted Patent
Utility
US 6,621,398 · App. 09/996,047
Magnetic core comprising a bond magnet including magnetic powder whose particle's surface is coated with oxidation-resistant metal
Inventors:
Teruhiko Fujiwara, Masayoshi Ishii, Haruki Hoshi, Keita Isogai, Hatsuo Matsumoto, Toru Ito, Tamiko Ambo
Patented Case
View Patent ↗
Granted: Sep 16, 2003
Filed: Nov 28, 2001
Inventors
Teruhiko Fujiwara
Masayoshi Ishii
Haruki Hoshi
Keita Isogai
Hatsuo Matsumoto
Toru Ito
Tamiko Ambo
Assignee (at issue)
NEC 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.