Granted Patent
Utility
US 5,351,752 · App. 07/906,669
Artificial lifting system
Inventors:
Steven M. Wood, Blaine Tew
Patented Case
View Patent ↗
Granted: Oct 4, 1994
Filed: Jun 30, 1992
Inventors
Steven M. Wood
Blaine Tew
Assignees (at issue)
Exoko, Incorporated (Wood)
Brunswick Corporation (TEW)
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.