Granted Patent
Utility
US 4,922,464 · App. 07/334,682
Portable mixer for processing food
Inventor:
Karl-Heinz Kamprath
Patented Case
View Patent ↗
Granted: May 1, 1990
Filed: Apr 6, 1989
Inventor
Karl-Heinz Kamprath
Assignee (at issue)
The Braun Corporation
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.