Granted Patent
Utility
US 5,608,692 · App. 08/193,348
Multi-layer polymer electroacoustic transducer assembly
Inventor:
Minoru Toda
Patented Case
View Patent ↗
Granted: Mar 4, 1997
Filed: Feb 8, 1994
Inventor
Minoru Toda
Assignee (at issue)
Whitaker & Company
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.