Granted Patent
Utility
US 6,680,814 · App. 10/232,690
Spindle motor and magnetic disc device with hydrodynamic bearings
Inventors:
Katsutoshi Nii, Masaru Muranishi, Shozo Saegusa, Tsuyoshi Takahashi, Kenji Tomida, Takashi Matsuki, Yuuichi Yanagase, Mitsuyuki Tsuyuki, Shinobu Yoshida, Hiroshi Nishida, Kazuhiko Kawakami
Patented Case
View Patent ↗
Granted: Jan 20, 2004
Filed: Sep 3, 2002
Inventors
Katsutoshi Nii
Masaru Muranishi
Shozo Saegusa
Tsuyoshi Takahashi
Kenji Tomida
Takashi Matsuki
Yuuichi Yanagase
Mitsuyuki Tsuyuki
Shinobu Yoshida
Hiroshi Nishida
Kazuhiko Kawakami
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.