Granted Patent
Utility
US 4,593,405 · App. 06/613,566
Loudspeaker system with combination crossover and equalizer
Inventors:
Kent H. Frye, Gary T. Ewald
Patented Case
View Patent ↗
Granted: Jun 3, 1986
Filed: May 24, 1984
Inventors
Kent H. Frye
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.