Granted Patent
Utility
US 6,227,281 · App. 09/377,576
Sectional door with roller shield apparatus
Inventor:
David Martin
Patented Case
View Patent ↗
Granted: May 8, 2001
Filed: Aug 19, 1999
Inventor
David Martin
Assignee (at issue)
Martin Door Manufacturing, 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.