Granted Patent
Utility
US 4,321,472 · App. 06/142,481
Panoramic dental X-ray machine with camera detached therefrom
Inventor:
Robert H. Cushman
Patented Case
View Patent ↗
Granted: Mar 23, 1982
Filed: Apr 21, 1980
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.