Granted Patent
Utility
US 5,342,989 · App. 08/062,116
Planar wave transducer assembly
Inventor:
Lester M. Barcus
Patented Case
View Patent ↗
Granted: Aug 30, 1994
Filed: May 14, 1993
Inventor
Lester M. Barcus
Assignee (at issue)
BBE Sound, 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.