Granted Patent
Utility
US 4,860,158 · App. 07/255,639
Low pressure metering fluid pump
Inventor:
Ralph V. Brown
Patented Case
View Patent ↗
Granted: Aug 22, 1989
Filed: Oct 11, 1988
Inventor
Ralph V. Brown
Assignee (at issue)
Facet Enterprises, Incorporated
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.