Granted Patent
Utility
US 6,097,288 · App. 09/257,400
Expandable, modular annunciation and intercom system
Inventor:
Eugene C. Koeppe
Patented Case
View Patent ↗
Granted: Aug 1, 2000
Filed: Feb 25, 1999
Inventor
Eugene C. Koeppe
Assignee (at issue)
LUCENT TECHNOLOGIES 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.