Granted Patent
Utility
US 6,572,520 · App. 09/860,129
Apparatus for transporting envelope blanks in an envelope making machine
Inventor:
Martin Blumle
Patented Case
View Patent ↗
Granted: Jun 3, 2003
Filed: May 17, 2001
Inventor
Martin Blumle
Assignee (at issue)
Winkler + Dunnebler Aktiengesellschaft
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.