Granted Patent
Utility
US 4,287,423 · App. 06/092,883
Panoramic dental radiography image intensification employing minification techniques
Inventor:
Robert H. Cushman
Patented Case
View Patent ↗
Granted: Sep 1, 1981
Filed: Nov 9, 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.