Granted Patent
Utility
US 6,457,973 · App. 09/714,517
Dental impression tray
Inventors:
Johann Fetz, Ingo Wagner, Joachim W. Zech
Patented Case
View Patent ↗
Granted: Oct 1, 2002
Filed: Nov 17, 2000
Inventors
Johann Fetz
Ingo Wagner
Joachim W. Zech
Assignee (at issue)
ESPE Dental AG
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.