Granted Patent
Utility
US 6,684,579 · App. 10/041,216
Drainage mat and mortar blocker
Inventors:
James R. Brunson, C. Davis Carman, Michael B. Obermeyer
Patented Case
View Patent ↗
Granted: Feb 3, 2004
Filed: Jan 8, 2002
Inventors
James R. Brunson
C. Davis Carman
Michael B. Obermeyer
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.