Granted Patent
Utility
US 4,660,987 · App. 06/828,705
Blender rotor improvements
Inventor:
Jon L. Robinson
Patented Case
View Patent ↗
Granted: Apr 28, 1987
Filed: Feb 12, 1986
Inventor
Jon L. Robinson
Assignee (at issue)
TCI CO., LTD.
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.