Granted Patent
Utility
US 5,557,280 · App. 08/111,430
Synchronized electronic identification system
Inventors:
Michael J. C. Marsh, Clinton Aiden Van Zyl
Patented Case
View Patent ↗
Granted: Sep 17, 1996
Filed: Aug 25, 1993
Inventors
Michael J. C. Marsh
Clinton Aiden Van Zyl
Assignee (at issue)
British Technology Group Limited
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.