Granted Patent
Utility
US 4,388,709 · App. 06/225,894
Funnel construction for a dipping sonar
Inventors:
Chester L. Reed, Robert M. Bridges
Patented Case
View Patent ↗
Granted: Jun 14, 1983
Filed: Jan 19, 1981
Inventors
Chester L. Reed
Robert M. Bridges
Assignee (at issue)
Bendix Limited
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.