Granted Patent
Utility
US 6,821,462 · App. 09/946,413
Mass production of shells and models for dental restorations produced by solid free-form fabrication methods
Inventors:
Martin L. Schulman, Carlino Panzera
Patented Case
View Patent ↗
Granted: Nov 23, 2004
Filed: Sep 5, 2001
Inventors
Martin L. Schulman
Carlino Panzera
Assignee (at issue)
Jeneric/Pentron Incorporated
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.