Granted Patent
Utility
US 4,032,263 · App. 05/616,553
Pump with coaxial inlet and outlet valve arrangement
Inventor:
Ramon Pareja
Patented Case
View Patent ↗
Granted: Jun 28, 1977
Filed: Sep 25, 1975
Inventor
Ramon Pareja
Assignee (at issue)
Lear Siegler, Inc.
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.