Granted Patent
Utility
US 5,396,534 · App. 08/135,090
Shutter apparatus for collimating x-rays
Inventor:
Howard Thomas
Patented Case
View Patent ↗
Granted: Mar 7, 1995
Filed: Oct 12, 1993
Inventor
Howard Thomas
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.