Granted Patent
Utility
US 4,467,659 · App. 06/407,434
Transducer having metal housing and employing mode conversion
Inventor:
Joseph Baumoel
Patented Case
View Patent ↗
Granted: Aug 28, 1984
Filed: Aug 12, 1982
Inventor
Joseph Baumoel
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.