Granted Patent
Utility
US 4,239,971 · App. 06/082,373
Simultaneously displaying varying tomographic images of dental arch with single panoramic X-ray exposure
Inventor:
Robert H. Cushman
Patented Case
View Patent ↗
Granted: Dec 16, 1980
Filed: Oct 5, 1979
Inventor
Robert H. Cushman
Assignee (at issue)
Pennwalt 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.