Granted Patent
Utility
US 6,785,396 · App. 10/207,131
Earphone
Inventor:
Atsushi Shirata
Patented Case
View Patent ↗
Granted: Aug 31, 2004
Filed: Jul 30, 2002
Inventor
Atsushi Shirata
Assignees (at issue)
PIONEER CORPORATION
Tohoku Pioneer 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.