Granted Patent
Utility
US 4,624,338 · App. 06/697,321
Loudspeaker enclosure for a vibrating diaphragm loudspeaker
Inventor:
Gary T. Ewald
Patented Case
View Patent ↗
Granted: Nov 25, 1986
Filed: Feb 1, 1985
Inventor
Gary T. Ewald
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.