Granted Patent
Utility
US 5,409,051 · App. 08/058,514
Track system for sectional doors
Inventors:
Willis Jay Mullet, Albert W. Mitchell
Patented Case
View Patent ↗
Granted: Apr 25, 1995
Filed: May 3, 1993
Inventors
Willis Jay Mullet
Albert W. Mitchell
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.