Granted Patent
Utility
US 4,824,255 · App. 07/066,460
Drive apparatus for a screw injection molding unit and a process for its operation
Inventor:
Walter Wohlrab
Patented Case
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Granted: Apr 25, 1989
Filed: Jun 26, 1987
Inventor
Walter Wohlrab
Assignee (at issue)
Krauss-Mafei AG
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.