Granted Patent
Utility
US 6,544,374 · App. 09/739,069
Method for making laminated roofing shingles
Inventors:
Thomas M. King, Devender Swaroop
Patented Case
View Patent ↗
Granted: Apr 8, 2003
Filed: Dec 18, 2000
Inventors
Thomas M. King
Devender Swaroop
Assignee (at issue)
TAMKO Roofing Products, 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.