Granted Patent
Utility
US 4,538,771 · App. 06/540,942
Apparatus for testing the integrity of an electrical coil as it is wound
Inventor:
John Tardy
Patented Case
View Patent ↗
Granted: Sep 3, 1985
Filed: Oct 11, 1983
Inventor
John Tardy
Assignee (at issue)
AT&T Technologies Incorporated
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.