Granted Patent
Utility
US 5,038,521 · App. 07/538,921
Sealing strips
Inventors:
Heinz Andrzejewski, Helmut Ginster
Patented Case
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Granted: Aug 13, 1991
Filed: Jun 15, 1990
Inventors
Heinz Andrzejewski
Helmut Ginster
Assignee (at issue)
Draftex Industries Limited
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.