Granted Patent
Utility
US 4,365,897 · App. 06/265,526
Separable blade agitator with clip-on impellers
Inventors:
Franklyn J. Amorese, Vincent J. Piarulli
Patented Case
View Patent ↗
Granted: Dec 28, 1982
Filed: May 20, 1981
Inventors
Franklyn J. Amorese
Vincent J. Piarulli
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.