Granted Patent
Utility
US 5,963,640 · App. 08/746,246
Radiotelephone having an acoustical wave guide coupled to a speaker
Inventor:
Karl W. Rabe
Patented Case
View Patent ↗
Granted: Oct 5, 1999
Filed: Nov 7, 1996
Inventor
Karl W. Rabe
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.