Granted Patent
Utility
US 4,716,849 · App. 06/739,535
Erosive-jet diver tool
Inventors:
Andrew F. Conn, Virgil Johnson, Jr.
Patented Case
View Patent ↗
Granted: Jan 5, 1988
Filed: May 31, 1985
Inventors
Andrew F. Conn
Virgil Johnson, Jr.
Assignee (at issue)
Tracor Hydronautics, 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.