Granted Patent
Utility
US 4,865,460 · App. 07/188,909
Static mixing device
Inventor:
Juergen Friedrich
Patented Case
View Patent ↗
Granted: Sep 12, 1989
Filed: May 2, 1988
Inventor
Juergen Friedrich
Assignee (at issue)
KAMA GMBH
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.