Granted Patent
Utility
US 6,358,319 · App. 09/451,653
Magnetic method and apparatus for depositing granules onto an asphalt-coated sheet
Inventors:
William Huykman, David P. Aschenbeck, John D. Phillips
Patented Case
View Patent ↗
Granted: Mar 19, 2002
Filed: Nov 30, 1999
Inventors
William Huykman
David P. Aschenbeck
John D. Phillips
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.