Granted Patent
Utility
US 5,645,346 · App. 08/641,883
Food preparation blender with a rotating and vertically oscillating mixing blade
Inventor:
Michael C. Thuna
Patented Case
View Patent ↗
Granted: Jul 8, 1997
Filed: May 2, 1996
Inventor
Michael C. Thuna
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.