Granted Patent
Utility
US 6,027,242 · App. 08/888,846
Food preparation blender with mixing blades oscillating between larger and smaller volumes
Inventor:
Michael Thuma
Patented Case
View Patent ↗
Granted: Feb 22, 2000
Filed: Jul 7, 1997
Inventor
Michael Thuma
Assignee (at issue)
24th & Dean
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.