Granted Patent
Utility
US 5,243,639 · App. 07/747,282
Floatable patient support board having an x-ray cassette holder
Inventor:
H. Clayton Johnson
Patented Case
View Patent ↗
Granted: Sep 7, 1993
Filed: Aug 19, 1991
Inventor
H. Clayton Johnson
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.