Granted Patent
Utility
US 4,284,392 · App. 05/756,051
Roller pump with radial members
Inventor:
Ramon Pareja
Patented Case
View Patent ↗
Granted: Aug 18, 1981
Filed: Jan 3, 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.