Granted Patent
Utility
US 5,128,905 · App. 07/634,125
Acoustic field transducers
Inventor:
Michael George Arnott
Patented Case
View Patent ↗
Granted: Jul 7, 1992
Filed: Jan 2, 1991
Inventor
Michael George Arnott
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.