Granted Patent
Utility
US 4,826,398 · App. 07/070,058
Medium consistency pump with self-feeding
Inventor:
Johan Gullichsen
Patented Case
View Patent ↗
Granted: May 2, 1989
Filed: Jul 6, 1987
Inventor
Johan Gullichsen
Assignee (at issue)
Kamyr AB
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.