Granted Patent
Utility
US 6,804,919 · App. 10/252,950
Backer for tabbed composite shingles
Inventor:
Sudhir Railkar
Patented Case
View Patent ↗
Granted: Oct 19, 2004
Filed: Sep 23, 2002
Inventor
Sudhir Railkar
Assignee (at issue)
BUILDING MATERIALS INVESTMENT CORPORATION
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.