Granted Patent
Utility
US 5,856,281 · App. 08/768,537
Bearing and manufacturing method of bearing, and magnetic disk device with bearing containing a lubricating grease
Inventors:
Masaki Otsuka, Iwao Matsuyama, Mitsuhiko Oguchi, Kazuhisa Murakami, Nobuyuki Ishii, Masayuki Katsumoto, Tsuneyuki Hasegawa, Satomi Yamaguchi
Patented Case
View Patent ↗
Granted: Jan 5, 1999
Filed: Dec 18, 1996
Inventors
Masaki Otsuka
Iwao Matsuyama
Mitsuhiko Oguchi
Kazuhisa Murakami
Nobuyuki Ishii
Masayuki Katsumoto
Tsuneyuki Hasegawa
Satomi Yamaguchi
Assignee (at issue)
HITACHI, LTD.
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.