Granted Patent
Utility
US 5,809,158 · App. 08/685,861
Transducer
Inventors:
Aart Zeger van Halteren, Onno Geschiere
Patented Case
View Patent ↗
Granted: Sep 15, 1998
Filed: Jul 24, 1996
Inventors
Aart Zeger van Halteren
Onno Geschiere
Assignee (at issue)
Microtronic Nederland, B.V.
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.