Granted Patent
Utility
US 5,153,512 · App. 07/644,020
Speed measuring system utilizing magneto-optic switch actuated by magnetic field rotation
Inventor:
William M. Glasheen
Patented Case
View Patent ↗
Granted: Oct 6, 1992
Filed: Jan 18, 1991
Inventor
William M. Glasheen
Assignee (at issue)
Amespace, 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.