Granted Patent
Utility
US 6,032,491 · App. 08/975,264
Apparatus for mold changing in heated glass sheet forming station
Inventors:
Dean M. Nitschke, Robert D. Caswall, Eustace H. Mumford, David B. Nitschke
Patented Case
View Patent ↗
Granted: Mar 7, 2000
Filed: Nov 20, 1997
Inventors
Dean M. Nitschke
Robert D. Caswall
Eustace H. Mumford
David B. Nitschke
Assignee (at issue)
Glasstech, 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.