Granted Patent
Utility
US 6,817,798 · App. 10/364,708
Method and apparatus for applying mastic or granular material to a roofing surface
Inventors:
William E. Kugler, Stephen J. Knight, III
Patented Case
View Patent ↗
Granted: Nov 16, 2004
Filed: Feb 10, 2003
Inventors
William E. Kugler
Stephen J. Knight, III
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.