Granted Patent
Utility
US 4,156,191 · App. 05/844,025
Method and apparatus for adjusting the magnetic coupling between a Hall Effect switch and a permanent magnet
Inventors:
Michael H. Knight, Clarence L. Eagle
Patented Case
View Patent ↗
Granted: May 22, 1979
Filed: Oct 20, 1977
Inventors
Michael H. Knight
Clarence L. Eagle
Assignee (at issue)
Gulf Eastern Manufacturing Company
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.