Granted Patent
Utility
US 4,221,488 · App. 06/017,828
Separable blade agitator and method and means for assembly
Inventors:
Erwin J. Nunlist, Howard G. Coleman, Edward S. Harrison
Patented Case
View Patent ↗
Granted: Sep 9, 1980
Filed: Mar 5, 1979
Inventors
Erwin J. Nunlist
Howard G. Coleman
Edward S. Harrison
Assignee (at issue)
Sybron 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.