Granted Patent
Utility
US 6,035,211 · App. 08/770,706
Dual use speaker for both voice communication and signalling
Inventors:
Karl W. Rabe, Trampas Stern
Patented Case
View Patent ↗
Granted: Mar 7, 2000
Filed: Dec 19, 1996
Inventors
Karl W. Rabe
Trampas Stern
Assignee (at issue)
ERICSSON GMBH
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.