Granted Patent
Utility
US 6,798,891 · App. 09/914,540
Speaker system
Inventors:
Koichi Sadaie, Kenichiro Toyofuku
Patented Case
View Patent ↗
Granted: Sep 28, 2004
Filed: Aug 29, 2001
Inventors
Koichi Sadaie
Kenichiro Toyofuku
Assignee (at issue)
ONKYO CORPORATION
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.