Granted Patent
Utility
US 6,639,989 · App. 09/400,770
Method for loudness calibration of a multichannel sound systems and a multichannel sound system
Inventors:
Nick Zacharov, Pekka Suokuisma
Patented Case
View Patent ↗
Granted: Oct 28, 2003
Filed: Sep 22, 1999
Inventors
Nick Zacharov
Pekka Suokuisma
Assignee (at issue)
Nokia Display Products Oy
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.