Granted Patent
Utility
US 6,625,259 · App. 09/537,141
Packet telephony gateway for hearing impaired relay services
Inventors:
Michael C. Hollatz, Paul D. Swardstrom
Patented Case
View Patent ↗
Granted: Sep 23, 2003
Filed: Mar 29, 2000
Inventors
Michael C. Hollatz
Paul D. Swardstrom
Assignee (at issue)
Rockwell Electronic Commerce
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.