Granted Patent
Utility
US 4,956,636 · App. 07/390,993
E.A.S. tag having a control component with selectively magnetizeable regions
Inventors:
David Sansom, Simon N. M. Willcock, Robert A. Woolley
Patented Case
View Patent ↗
Granted: Sep 11, 1990
Filed: Aug 9, 1989
Inventors
David Sansom
Simon N. M. Willcock
Robert A. Woolley
Assignee (at issue)
Thorn EMI plc
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.