Granted Patent
Utility
US 4,300,021 · App. 06/105,838
Line circuit controlled by a hall effect device
Inventor:
Hendrik W. Van Husen
Patented Case
View Patent ↗
Granted: Nov 10, 1981
Filed: Dec 20, 1979
Inventor
Hendrik W. Van Husen
Assignee (at issue)
GTE Automatic Electric Labs 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.