Granted Patent
Utility
US 4,646,873 · App. 06/836,237
Microphone and acoustic equalizer therefor
Inventor:
Michael A. Bryson
Patented Case
View Patent ↗
Granted: Mar 3, 1987
Filed: Mar 4, 1986
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.