Granted Patent
Utility
US 6,449,376 · App. 09/399,536
Planar-type loudspeaker with at least two diaphragms
Inventors:
Carlos Beltran, Lewis Athanas, David Cahill, Wako Iwasaki, Andrew Kotsatos
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: Sep 20, 1999
Inventors
Carlos Beltran
Lewis Athanas
David Cahill
Wako Iwasaki
Andrew Kotsatos
Assignee (at issue)
Boston Acoustics, Inc.
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.