Granted Patent
Utility
US 6,521,076 · App. 09/607,270
Method of making shingles of two different dimensions using a common shingle mat size
Inventor:
Bert W. Elliott
Patented Case
View Patent ↗
Granted: Feb 18, 2003
Filed: Jun 30, 2000
Inventor
Bert W. Elliott
Assignee (at issue)
Owens-Corning Fiberglas Technology, 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.