Granted Patent
Utility
US 4,547,632 · App. 06/597,238
Dynamic loudspeaker
Inventor:
Michael A. Bryson
Patented Case
View Patent ↗
Granted: Oct 15, 1985
Filed: Apr 4, 1984
Inventor
Michael A. Bryson
Assignee (at issue)
Electro-Voice, 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.