Granted Patent
Utility
US 6,527,037 · App. 09/858,787
Rolling door tensioner
Inventors:
Mark Daus, Alvin Eiterman
Patented Case
View Patent ↗
Granted: Mar 4, 2003
Filed: May 16, 2001
Inventors
Mark Daus
Alvin Eiterman
Assignee (at issue)
Wayne-Dalton Corp.
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.