Granted Patent
Utility
US 4,228,399 · App. 05/881,737
Offshore pipeline electrical survey method and apparatus
Inventors:
Frank Rizzo, Marvin Leon Miller, Clark P. Weldon
Patented Case
View Patent ↗
Granted: Oct 14, 1980
Filed: Feb 27, 1978
Inventors
Frank Rizzo
Marvin Leon Miller
Clark P. Weldon
Assignee (at issue)
HARCO, LLC
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.