Granted Patent
Utility
US 5,083,920 · App. 07/536,902
Phantom for a dental panoramic x-ray apparatus
Inventors:
Roberto Molteni, Vincenzo Di Piero
Patented Case
View Patent ↗
Granted: Jan 28, 1992
Filed: Jun 12, 1990
Inventors
Roberto Molteni
Vincenzo Di Piero
Assignee (at issue)
U.S. Philips 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.