Granted Patent
Utility
US 6,632,046 · App. 09/932,125
Mold liner for facilitating manufacture of reinforced drainage blocks
Inventors:
Robert J. King, David Robertson
Patented Case
View Patent ↗
Granted: Oct 14, 2003
Filed: Aug 17, 2001
Inventors
Robert J. King
David Robertson
Assignee (at issue)
ACO POLYMER 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.