Granted Patent
Utility
US 4,479,591 · App. 06/400,044
Apparatus and method for removing foreign materials from a cement metering wheel
Inventors:
George Burkhart, Joseph M. White, Diane M. Witkonis
Patented Case
View Patent ↗
Granted: Oct 30, 1984
Filed: Jul 20, 1982
Inventors
George Burkhart
Joseph M. White
Diane M. Witkonis
Assignee (at issue)
Barber-Greene Company
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.