Granted Patent
Utility
US 4,171,708 · App. 05/790,706
Bypass and unloader valve
Inventor:
Ramon Pareja
Patented Case
View Patent ↗
Granted: Oct 23, 1979
Filed: Apr 25, 1977
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.