Granted Patent
Utility
US 6,181,908 · App. 09/393,244
Apparatus for corrugating materials
Inventors:
Michael Craig Leemhuis, Daniel Joseph Westhoff
Patented Case
View Patent ↗
Granted: Jan 30, 2001
Filed: Sep 10, 1999
Inventors
Michael Craig Leemhuis
Daniel Joseph Westhoff
Assignee (at issue)
Lexmark International, Inc.
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.