Granted Patent
Utility
US 4,534,248 · App. 06/556,567
Method and an apparatus for the removal of waste material in rotary punching
Inventor:
Thorbjorn Andersson
Patented Case
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Granted: Aug 13, 1985
Filed: Nov 30, 1983
Inventor
Thorbjorn Andersson
Assignee (at issue)
Tetra Pak International AB
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.