Granted Patent
Utility
US 6,145,570 · App. 09/169,864
Locking system for sectional doors
Inventors:
Willis Jay Mullet, Harry Edward Asbury
Patented Case
View Patent ↗
Granted: Nov 14, 2000
Filed: Oct 12, 1998
Inventors
Willis Jay Mullet
Harry Edward Asbury
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.