Granted Patent
Utility
US 5,243,280 · App. 07/852,727
Magnetic sensor and position detector
Inventor:
Masaaki Kusumi
Patented Case
View Patent ↗
Granted: Sep 7, 1993
Filed: Mar 17, 1992
Inventor
Masaaki Kusumi
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.