Granted Patent
Utility
US 6,009,182 · App. 08/921,185
Down-fill speaker for large scale sound reproduction system
Inventor:
David W. Gunness
Patented Case
View Patent ↗
Granted: Dec 28, 1999
Filed: Aug 29, 1997
Inventor
David W. Gunness
Assignee (at issue)
Eastern Acoustic Works, 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.