Granted Patent
Utility
US 6,256,380 · App. 09/233,659
Methods for processing operator service system calls
Inventors:
Renee Berkowitz, Wesley Downum
Patented Case
View Patent ↗
Granted: Jul 3, 2001
Filed: Jan 19, 1999
Inventors
Renee Berkowitz
Wesley Downum
Assignee (at issue)
Telcordia 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.