Granted Patent
Utility
US 6,654,475 · App. 09/964,528
Electricity-to-sound transducer
Inventor:
Jiro Nakaso
Patented Case
View Patent ↗
Granted: Nov 25, 2003
Filed: Sep 28, 2001
Inventor
Jiro Nakaso
Assignee (at issue)
Victor Company of Japan, Ltd.
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.