Granted Patent
Utility
US 4,440,221 · App. 06/186,980
Submergible pump installation
Inventors:
Donald F. Taylor, William G. Boyle
Patented Case
View Patent ↗
Granted: Apr 3, 1984
Filed: Sep 15, 1980
Inventors
Donald F. Taylor
William G. Boyle
Assignee (at issue)
Otis Engineering Corporation
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.