Granted Patent
Utility
US 6,522,758 · App. 09/376,652
Compensation system for planar loudspeakers
Inventor:
Michael Petroff
Patented Case
View Patent ↗
Granted: Feb 18, 2003
Filed: Aug 18, 1999
Inventor
Michael Petroff
Assignee (at issue)
Sound Advance Systems, Inc.
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.