Granted Patent
Utility
US 4,843,628 · App. 06/883,985
Inertial microphone/receiver with extended frequency response
Inventor:
Alan Hofer
Patented Case
View Patent ↗
Granted: Jun 27, 1989
Filed: Jul 10, 1986
Inventor
Alan Hofer
Assignee (at issue)
Stanton Magnetics, 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.