Granted Patent
Utility
US 5,940,490 · App. 08/519,061
Call processing to provide number portability
Inventors:
Mark D. Foster, G. David Butler, II, Sherman L. Ackley, Bradley Baxter, Kenneth Andrew Moisey, Kenith L. Mann
Patented Case
View Patent ↗
Granted: Aug 17, 1999
Filed: Aug 23, 1995
Inventors
Mark D. Foster
G. David Butler, II
Sherman L. Ackley
Bradley Baxter
Kenneth Andrew Moisey
Kenith L. Mann
Assignees (at issue)
Stratus Computer, Inc.
U.S. Intelco
Electric Lightwave
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.