Granted Patent
Utility
US 4,551,075 · App. 06/487,005
Well pump
Inventor:
Carlos R. Canalizo
Patented Case
View Patent ↗
Granted: Nov 5, 1985
Filed: Apr 21, 1983
Inventor
Carlos R. Canalizo
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.