Granted Patent
Utility
US 5,887,068 · App. 08/583,504
Multi-driver in-phase bipolar array loudspeaker
Inventors:
Don E. Givogue, Robert G. Johnston, Jr.
Patented Case
View Patent ↗
Granted: Mar 23, 1999
Filed: Jan 5, 1996
Inventors
Don E. Givogue
Robert G. Johnston, Jr.
Assignee (at issue)
Definitive Technology Group, LLC
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.