Granted Patent
Utility
US 4,780,064 · App. 06/828,156
Pump assembly and its method of operation
Inventor:
John H. Olsen
Patented Case
View Patent ↗
Granted: Oct 25, 1988
Filed: Feb 10, 1986
Inventor
John H. Olsen
Assignee (at issue)
Flow Industries, Ltd.
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.