Granted Patent
Utility
US 5,321,332 · App. 07/975,467
Wideband ultrasonic transducer
Inventor:
Minoru Toda
Patented Case
View Patent ↗
Granted: Jun 14, 1994
Filed: Nov 12, 1992
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.