Granted Patent
Utility
US 6,044,159 · App. 08/992,679
Planar film speaker with inertial driver
Inventors:
Neil Johan Schmertmann, John M. McKee
Patented Case
View Patent ↗
Granted: Mar 28, 2000
Filed: Dec 17, 1997
Inventors
Neil Johan Schmertmann
John M. McKee
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.