Granted Patent
Utility
US 5,598,455 · App. 08/360,104
Alarm and test system for a digital added main line
Inventors:
David C. Bliven, Anthony Vranicar, Philip B. Vail, Gerald L. Shimirak, Julian S. Mullaney
Patented Case
View Patent ↗
Granted: Jan 28, 1997
Filed: Dec 20, 1994
Inventors
David C. Bliven
Anthony Vranicar
Philip B. Vail
Gerald L. Shimirak
Julian S. Mullaney
Assignee (at issue)
Raychem 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.