Granted Patent
Utility
US 6,169,810 · App. 08/839,764
Electroacoustic transducer
Inventors:
A. Z. van Halteren, E. Wilmink, M. de Blok, O. Geschiere, J. M. van Doorn
Patented Case
View Patent ↗
Granted: Jan 2, 2001
Filed: Apr 15, 1997
Inventors
A. Z. van Halteren
E. Wilmink
M. de Blok
O. Geschiere
J. M. van Doorn
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.