Granted Patent
Utility
US 6,229,231 · App. 08/964,586
Reciprocating motor having controllable rotor position
Inventors:
Takashi Ishida, Shigeru Ooki
Patented Case
View Patent ↗
Granted: May 8, 2001
Filed: Nov 5, 1997
Inventors
Takashi Ishida
Shigeru Ooki
Assignee (at issue)
Seiko Seiki Kabushiki Kaisha
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.