Granted Patent
Utility
US 4,519,796 · App. 06/505,237
Thoracic drainage device
Inventor:
Ronald D. Russo
Patented Case
View Patent ↗
Granted: May 28, 1985
Filed: Jun 17, 1983
Inventor
Ronald D. Russo
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.