Granted Patent
Utility
US 5,944,490 · App. 08/745,476
Pneumatically operated submersible pump with float control
Inventor:
Michael K. Breslin
Patented Case
View Patent ↗
Granted: Aug 31, 1999
Filed: Nov 12, 1996
Inventor
Michael K. Breslin
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.