Granted Patent
Utility
US 5,226,076 · App. 07/486,444
Directional microphone assembly
Inventors:
John Charles Baumhauer, Jr., Jeffrey Phillip McAteer, Frederick A. Rosebrock, Richard M. Sachs
Patented Case
View Patent ↗
Granted: Jul 6, 1993
Filed: Feb 28, 1993
Inventors
John Charles Baumhauer, Jr.
Jeffrey Phillip McAteer
Frederick A. Rosebrock
Richard M. Sachs
Assignee (at issue)
AT&T Bell Laboratories
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.