Granted Patent
Utility
US 6,556,661 · App. 09/713,978
In-line telephony data protector with line condition announce
Inventors:
Daryl Ingalsbe, Douglas H. Ferguson
Patented Case
View Patent ↗
Granted: Apr 29, 2003
Filed: Nov 16, 2000
Inventors
Daryl Ingalsbe
Douglas H. Ferguson
Assignee (at issue)
Independent Technologies, LLC
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.