Granted Patent
Utility
US 5,522,446 · App. 08/260,108
Sectional overhead door
Inventors:
Willis Jay Mullet, Albert W. Mitchell
Patented Case
View Patent ↗
Granted: Jun 4, 1996
Filed: Jun 15, 1994
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.