Granted Patent
Utility
US 6,385,322 · App. 09/096,691
Method and device for operation of a public address (acoustic irradiation) system
Inventor:
Andreas Mietling
Patented Case
View Patent ↗
Granted: May 7, 2002
Filed: Jun 12, 1998
Inventor
Andreas Mietling
Assignee (at issue)
d&b audiotechnik GmbH
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.