Granted Patent
Utility
US 4,292,990 · App. 06/119,364
High pressure unloader valve
Inventor:
Ramon Pareja
Patented Case
View Patent ↗
Granted: Oct 6, 1981
Filed: Feb 7, 1980
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.