Granted Patent
Utility
US 5,953,432 · App. 08/911,183
Line source speaker system
Inventors:
Hirofumi Yanagawa, Ziqing Zhang
Patented Case
View Patent ↗
Granted: Sep 14, 1999
Filed: Aug 14, 1997
Inventors
Hirofumi Yanagawa
Ziqing Zhang
Assignee (at issue)
Pioneer Electronic 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.