Granted Patent
Utility
US 5,142,292 · App. 07/740,278
Coplanar multiple loop antenna for electronic article surveillance systems
Inventor:
Luke C. Chang
Patented Case
View Patent ↗
Granted: Aug 25, 1992
Filed: Aug 5, 1991
Inventor
Luke C. Chang
Assignee (at issue)
CHECKPOINT SYSTEMS, 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.