Granted Patent
Utility
US 6,040,648 · App. 09/235,671
Spindle motor and rotator device
Inventors:
Naoki Kawawada, Hiroaki Namiki, Isamu Takehara, Tadao Iwaki, Takashi Ishida, Shinichi Hayashizaki, Hirotada Shimaguchi, Katsushige Konno
Patented Case
View Patent ↗
Granted: Mar 21, 2000
Filed: Jan 22, 1999
Inventors
Naoki Kawawada
Hiroaki Namiki
Isamu Takehara
Tadao Iwaki
Takashi Ishida
Shinichi Hayashizaki
Hirotada Shimaguchi
Katsushige Konno
Assignee (at issue)
SEIKO INSTRUMENTS INC.
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.