Granted Patent
Utility
US 5,663,643 · App. 08/536,171
Position detecting apparatus using offset calculated from sum of three-phase signals
Inventor:
Yasuhiko Matuyama
Patented Case
View Patent ↗
Granted: Sep 2, 1997
Filed: Sep 29, 1995
Inventor
Yasuhiko Matuyama
Assignee (at issue)
Sony Magnescale 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.