Granted Patent
Utility
US 4,523,543 · App. 06/567,589
Asphalt shingles - color blend drop sequence randomized by deposition means controlled by random signal generator to obviate stripes on roof
Inventors:
Thomas R. Brady, Lester C. Benner
Patented Case
View Patent ↗
Granted: Jun 18, 1985
Filed: Jan 3, 1984
Inventors
Thomas R. Brady
Lester C. Benner
Assignee (at issue)
Owens-Corning Fiberglas Corp.
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.