Granted Patent
Utility
US 5,539,804 · App. 08/201,980
Common channel signalling communication monitoring system
Inventors:
Hausting Hong, Eric Yam, D. P. Patel, Vaikunth N. Gupta
Patented Case
View Patent ↗
Granted: Jul 23, 1996
Filed: Feb 25, 1994
Inventors
Hausting Hong
Eric Yam
D. P. Patel
Vaikunth N. Gupta
Assignee (at issue)
CTel Compression Telecommunications Corporation
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.