Granted Patent
Utility
US 5,975,879 · App. 08/940,625
Rotatable sheet support structure for a twin-sheet thermoformer
Inventors:
William L. Dresen, James Patrick Hart
Patented Case
View Patent ↗
Granted: Nov 2, 1999
Filed: Sep 30, 1997
Inventors
William L. Dresen
James Patrick Hart
Assignee (at issue)
Alltrista 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.