Granted Patent
Utility
US 4,281,269 · App. 06/087,374
Microfocus X-ray tube
Inventor:
Robert S. Ledley
Patented Case
View Patent ↗
Granted: Jul 28, 1981
Filed: Oct 23, 1979
Inventor
Robert S. Ledley
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.