Granted Patent
Utility
US 5,374,921 · App. 07/791,195
Fibre optic security and communications link
Inventors:
Brian Martin, Gary Loubert
Patented Case
View Patent ↗
Granted: Dec 20, 1994
Filed: Nov 13, 1991
Inventors
Brian Martin
Gary Loubert
Assignee (at issue)
Instantel 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.