Granted Patent
Utility
US 5,212,336 · App. 07/720,406
Planar wave transducer assembly
Inventor:
Lester M. Barcus
Patented Case
View Patent ↗
Granted: May 18, 1993
Filed: Jun 25, 1991
Inventor
Lester M. Barcus
Assignee (at issue)
Barcus-Berry, 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.