Granted Patent
Utility
US 4,879,544 · App. 07/116,585
Intrusion detection system
Inventors:
Melvin C. Maki, Walter J. Feller
Patented Case
View Patent ↗
Granted: Nov 7, 1989
Filed: Nov 4, 1987
Inventors
Melvin C. Maki
Walter J. Feller
Assignee (at issue)
Control Data Canada 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.