Granted Patent
Utility
US 5,682,436 · App. 08/451,497
Multipoint driving loudspeaker having repulsion magnetic-type driving unit
Inventors:
Yoshio Sakamoto, Toshitaka Kawamidori
Patented Case
View Patent ↗
Granted: Oct 28, 1997
Filed: May 26, 1995
Inventors
Yoshio Sakamoto
Toshitaka Kawamidori
Assignee (at issue)
KENWOOD LIMITED
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.