Granted Patent
Utility
US 5,138,666 · App. 07/758,707
Voice transmission system
Inventors:
Alfred Bauer, Thomas Dobbins
Patented Case
View Patent ↗
Granted: Aug 11, 1992
Filed: Sep 9, 1991
Inventors
Alfred Bauer
Thomas Dobbins
Assignee (at issue)
Actron Manufacturing, 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.