Granted Patent
Utility
US 6,622,772 · App. 10/133,824
Method for forming sand molds and matchplate molding machine for accomplishing same
Inventor:
William A. Hunter
Patented Case
View Patent ↗
Granted: Sep 23, 2003
Filed: Apr 26, 2002
Inventor
William A. Hunter
Assignee (at issue)
Hunter Automated Machinery Corporation
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.