Granted Patent
Utility
US 4,769,828 · App. 06/542,891
Radiography
Inventor:
Christopher Archibald Gordon LeMay
Patented Case
View Patent ↗
Granted: Sep 6, 1988
Filed: Oct 17, 1983
Inventor
Christopher Archibald Gordon LeMay
Assignee (at issue)
EMI, LLC
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.